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Two-source hypothesis
Two-source hypothesis
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Two-source hypothesis
Theory Information
OrderMark, Q
Matt, Luke
Additional SourcesQ source
Gospels' Sources
MatthewMark, Q
LukeMark, Q
Theory History
OriginatorChristian Hermann Weisse
Origination Date1838
ProponentsHeinrich Julius Holtzmann
William Sanday
B.H. Streeter

The two-source hypothesis (or 2SH) is an explanation for the synoptic problem, the pattern of similarities and differences between the three Gospels of Matthew, Mark, and Luke. It posits that the Gospel of Matthew and the Gospel of Luke were based on the Gospel of Mark and a hypothetical sayings collection from the Christian oral tradition called Q.

The two-source hypothesis emerged in the 19th century. B. H. Streeter definitively stated the case in 1924, adding that two other sources, referred to as M and L, lie behind the material in Matthew and Luke respectively. The strengths of the hypothesis are its explanatory power regarding the shared and non-shared material in the three gospels; its weaknesses lie in the exceptions to those patterns, and in the hypothetical nature of its proposed collection of Jesus-sayings. Later scholars have advanced numerous elaborations and variations on the basic hypothesis, and even completely alternative hypotheses that are increasing in popularity.[1][2]: 5  Nevertheless, "the 2SH commands the support of most biblical critics from all continents and denominations."[3]

When Streeter's two additional sources, M and L, are taken into account, this hypothesis is sometimes referred to as the four-document hypothesis.

History

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The two-source hypothesis was first articulated in 1838 by Christian Hermann Weisse,[3] but it did not gain wide acceptance among German critics until Heinrich Julius Holtzmann endorsed it in 1863. Prior to Holtzmann, most Catholic scholars held to the Augustinian hypothesis (Matthew → Mark → Luke) and Protestant biblical critics favored the Griesbach hypothesis (Matthew → Luke → Mark). The Two-Source Hypothesis crossed the channel into England in the 1880s primarily due to the efforts of William Sanday, culminating in B. H. Streeter's definitive statement of the case in 1924. Streeter further argued that additional sources, referred to as M and L, lie behind the material in Matthew and Luke respectively.[4][5]

Background: the synoptic problem

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The hypothesis is a solution to what is known as the synoptic problem: the question of how best to account for the differences and similarities between the three synoptic gospels, Matthew, Mark and Luke. The answer to this problem has implications for the order in which the three were composed, and the sources on which their authors drew.

Any solution to the synoptic problem needs to account for two features:

  • The "triple tradition": The three gospels frequently share both wording and arrangement of "pericopes" (incidents, stories - this substantial sharing is what led to them being called "synoptic", or seeing-together). Where they differ on this shared material, Mark and Luke will agree against Matthew, or Mark and Matthew will agree against Luke, but very rarely will Mark be the odd one out. Matthew's and Luke's versions of shared pericopes will usually be shorter than Mark's.
  • The "double tradition": Sometimes Matthew and Luke share material which is not present in Mark. In these cases Matthew and Luke sometimes parallel each other closely, but at other times are widely divergent.[6]

Overview of the hypothesis

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The 2SH attempts to solve the synoptic problem by advancing two propositions, Marcan priority to explain the triple tradition, and the existence of a lost Q document to solve the double tradition. In summary, the two-source hypothesis proposes that Matthew and Luke used Mark for its narrative material as well as for the basic structural outline of chronology of Jesus' life; and that Matthew and Luke use a second source, Q (from German Quelle, "source"), not extant, for the sayings (logia) found in both of them but not in Mark.[7]

Marcan priority

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The 2SH explains the features of the triple tradition by proposing that both Matthew and Luke used Mark as a source. Mark appears more 'primitive': his diction and grammar are less literary than Matthew and Luke, his language is more prone to redundancy and obscurity, his Christology is less supernatural, and he makes more frequent use of Aramaic. The more sophisticated versions of Mark's pericopes in Matthew and Luke must be either the result of those two "cleaning up" Mark, if his is the first gospel, or of Mark "dumbing down" Matthew and/or Luke, if he was later. Critics regard the first explanation as the more likely. On a more specific level, Marcan priority seems to be indicated due to instances where Matthew and Luke apparently omit explanatory material from Mark, where Matthew adds his own theological emphases to Mark's stories, and in the uneven distribution of Mark's stylistic features in Matthew.[8]

The existence of Q

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The 2SH explains the double tradition by postulating the existence of a lost "sayings of Jesus" document known as Q, from the German Quelle, "source". It is this, rather than Marcan priority, which forms the distinctive feature of the 2SH as against rival theories. The existence of Q follows from the conclusion that, as Luke and Matthew are independent of Mark in the double tradition, the connection between them must be explained by their joint but independent use of a missing source or sources. (That they used Q independently of each other follows from the fact that they frequently differ quite widely in their use of this source).[8]

Problems with the hypothesis

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While the 2SH remains the most popular explanation for the origins of the synoptic gospels, two questions - the existence of the so-called "minor agreements," and problems with the hypothesis of Q - continue at the centre of discussion over its explanatory power, and alternative hypotheses that posit the direct use of Matthew by Luke or vice versa without Q are increasing in popularity within scholarship.[1][2]

The minor agreements

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The "minor agreements" are those points where Matthew and Luke agree against Mark (for example, the mocking question at the beating of Jesus, "Who is it that struck you?", found in both Matthew and Luke but not in Mark). The "minor agreements" thus call into question the proposition that Matthew and Luke knew Mark but not each other. Streeter devoted a chapter to the matter, arguing that the Matthew/Luke agreements were due to coincidence, or to the result of the two authors' reworking of Mark into more refined Greek, or to overlaps with Q or oral tradition, or to textual corruption.

A few later scholars explain the minor agreements as being due to Luke's using Matthew in addition to Q and Mark (3SH). But the modern argument for Q requires Matthew and Luke to be independent, so the 3SH raises the question of how to establish a role for Q if Luke is dependent on Matthew. Accordingly, some scholars (like Helmut Koester) who wish to keep Q while acknowledging the force of the minor agreements attribute them to a proto-Mark, such as the Ur-Markus in the Marcan Hypothesis (MkH), adapted by Mark independently from its use by Matthew and Luke. Still other scholars feel that the minor agreements are due to a revision of the Mark found in the Bible, called deutero-Mark. In this case, both Matthew and Luke are dependent on proto-Mark, which did not survive the ages.

"Therefore, the minor agreements, if taken seriously, force a choice between accepting pure Marcan priority on one hand or the existence of Q on the other hand, but not both simultaneously as the 2SH requires."[6][who said this?]

Problems with Q

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A principal objection to the 2SH is that it requires a hypothetical document, Q, the existence of which is not attested, either by existing fragments or by early Church tradition. The minor agreements are also, according to the critics, evidence of the non-existence of, or rather the non-necessity for, Q: if Matthew and Luke have passages which are missing in Mark (the "Who is it that struck you?" sentence quoted above is a famous example), this demonstrates only that Matthew is quoting Luke or vice versa.

Two additional problems are noteworthy, the "problem of fatigue" and the Q narrative problem. The first relates to the phenomenon that a scribe, when copying a text, will tend to converge on his source out of simple fatigue. Thus Mark calls Herod by the incorrect title basileus, "king", throughout, while Matthew begins with the more correct tetrarches but eventually switches to basileus. When similar changes occur in double tradition material, which according to the 2SH are the result of Matthew and Luke relying on Q, they usually show Luke converging on Matthew.[9]

Pierson Parker in 1940 suggested that the non-canonical Gospel of the Hebrews was the second source used in the Gospel of Luke.[10] This view is yet to gain influence.[11]

Variants

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The two-document hypothesis emerged in the 19th century: Mark as the earliest gospel, Matthew and Luke written independently and reliant on both Mark and the hypothetical Q. In 1924 B. H. Streeter refined the two-document hypothesis into the four-document hypothesis based on the possibility of a Jewish M source (see the Gospel according to the Hebrews).

While the standard two-source theory holds Mark and Q to be independent, some argue that Q was also a source for Mark.[12] This is sometimes called the Modified two-document hypothesis (although that term was also used in older literature to refer to the Four-document hypothesis).[13]

A number of scholars have suggested a Three-source hypothesis, that Luke actually did make some use of Matthew after all. This allows much more flexibility in the reconstruction of Q.

Dunn proposes an Oral Q hypothesis, in which Q is not a document but a body of oral teachings.[14]

Other hypotheses

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Some form of the Two Source hypothesis continues to be preferred by a majority of New Testament scholars as the theory that is best able to resolve the synoptic problem. Nevertheless, doubts about the problems of the minor agreements and, especially, the hypothetical Q, have produced alternative hypotheses.

In 1955 a British scholar, A. M. Farrer, proposed that one could dispense with Q by arguing that Luke revised both Mark and Matthew. In 1965 an American scholar, William R. Farmer, also seeking to do away with the need for Q, revived an updated version of Griesbach's idea that Mark condensed both Matthew and Luke. In Britain, the most influential modern opponents of the 2SH favor the Farrer hypothesis, while Farmer's revised Griesbach hypothesis, also known as the Two Gospel hypothesis, is probably the chief rival to the Two Source hypothesis in America.[15]

In 1838, the German theologian Christian Gottlob Wilke argued for a solution that combined Marcan priority with an extensively developed argument for Matthew's direct dependence upon both Mark and Luke. Thus, like Farrer, Wilke's hypothesis has no need for Q, but it simply reverses the direction of presumed dependence between Matthew and Luke proposed by Farrer. A few other German scholars supported Wilke's hypothesis in the nineteenth century, but in time most came to accept the two-source hypothesis, which remains the dominant theory to this day. The Wilke hypothesis was accepted by Karl Kautsky in his Foundations of Christianity[16] and has begun to receive new attention in recent decades since its revival in 1992 by Huggins,[17] then Hengel,[18] then independently by Blair.[19] Additional recent supporters include Garrow[20] and Powell.[21]

The traditional view is represented by the Augustinian hypothesis, which is that the four gospels were written in the order in which they appear in the bible (Matthew → Mark → Luke), with Mark a condensed edition of Matthew. This hypothesis was based on the claim by the 2nd century AD bishop Papias that he had heard that Matthew wrote first. By the 18th century the problems with Augustine's idea led Johann Jakob Griesbach to put forward the Griesbach hypothesis, which was that Luke had revised Matthew and that Mark had then written a shorter gospel using material on which both Matthew and Luke agreed (Matthew → Luke → Mark).

A variant of the Augustinian hypothesis, attempting to synchronise Matthew and Mark on the basis of the Mosaic "two witnesses" requirement of Deuteronomy 19:15 (Matthew + Mark → Luke), was proposed by Eta Linnemann, following rejection of the view of her teacher Rudolf Bultmann.

See also

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References

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Revisions and contributorsEdit on WikipediaRead on Wikipedia
from Grokipedia
The Two-source hypothesis (2SH), also known as the two-document hypothesis, is a scholarly theory that explains the literary relationships among the —Matthew, Mark, and Luke—by positing that the Gospel of Mark was composed first and served as a primary narrative source for both Matthew and Luke, while the two latter Gospels also independently drew upon a lost, hypothetical collection of ' sayings referred to as "" (from the German Quelle, meaning "source"). This hypothesis accounts for the extensive verbal agreements and shared order of events between Matthew and Luke where they overlap with Mark (known as the "triple tradition"), as well as the material unique to Matthew and Luke but common to both (the "double tradition"), which is attributed to . The hypothesis emerged in the 19th century as biblical scholars sought to resolve the "synoptic problem," the puzzle of how the three Gospels exhibit such close parallels in content, wording, and structure despite notable differences. It was first systematically articulated in 1838 by German theologian Christian Hermann Weisse, who proposed Markan priority alongside a sayings source, building on earlier observations about Mark's brevity and the agreements between Matthew and Luke. The theory gained prominence through Heinrich Julius Holtzmann's influential 1863 work Die synoptischen Evangelien, which refined Weisse's ideas and emphasized linguistic and sequential for Mark as the foundational text. By the early 20th century, British scholar B. H. Streeter's 1924 book The Four Gospels provided the most comprehensive defense, expanding the model to include special sources "M" (for Matthew) and "L" (for Luke) to explain material unique to each Gospel, though the core two-source framework remains focused on Mark and . Today, the 2SH represents the majority view among scholars, valued for its simplicity and explanatory power in reconstructing the Gospels' compositional history without assuming direct interdependence between Matthew and Luke. Key evidence supporting the hypothesis includes the observation that approximately 92% of content appears in Matthew and 58% in Luke, often in nearly identical wording and sequence, suggesting that Mark provided a basic outline that the later evangelists edited and expanded independently. For instance, Matthew and Luke frequently omit or rephrase Markan elements deemed embarrassing or theologically awkward, such as the disciples' misunderstanding of ' predictions (Mark 9:32) or the naked young man fleeing at ' arrest (Mark 14:51–52), but they rarely agree against Mark in these alterations, indicating separate uses of the source. The is inferred from over 200 verses of double tradition, including the (Matthew 5:3–12; Luke 6:20–23) and the (Matthew 6:9–13; Luke 11:2–4), where Matthew and Luke show strong verbal parallels and a consistent order not found in Mark, pointing to a pre-existing written of sayings rather than oral transmission or mutual borrowing. Luke's prologue (Luke 1:1–4) further bolsters this by acknowledging the use of multiple prior accounts, aligning with the idea of compiling from established sources like Mark and . Despite its dominance, the two-source hypothesis faces challenges from alternative theories, such as the Farrer-Goulder hypothesis (which eliminates Q in favor of Luke using Matthew directly) and the Two-Gospel hypothesis (which reverses the order to prioritize Matthew and Luke over Mark). Critics highlight "minor agreements" where Matthew and Luke align against Mark in ways that might suggest interdependence, as well as the absence of any physical manuscript for Q, though proponents counter that the hypothesis best fits the overall patterns of agreement and divergence without unnecessary complexity. Ongoing research continues to refine understandings of these sources, contributing to broader discussions on the historical formation of the New Testament.

The Synoptic Problem

The synoptic problem refers to the scholarly question of how the Gospels of Matthew, Mark, and Luke came to share so much material in common, often in the same order and wording, while also exhibiting significant differences, leading to hypotheses about their literary interrelationships and sources.

Similarities in the Synoptic Gospels

The triple tradition encompasses the extensive material common to all three Synoptic Gospels—Matthew, Mark, and Luke—characterized by close verbal agreements and sequential parallels in numerous pericopes, including narratives, miracles, and teachings attributed to Jesus. This shared content forms the backbone of the Synoptics' resemblance, with many passages exhibiting nearly identical wording that suggests literary interconnection rather than independent composition. For instance, the baptism of Jesus is recounted with striking similarity across the Gospels: in Mark 1:9–11, Jesus emerges from the water as the heavens tear open and a voice declares him the beloved Son; Matthew 3:13–17 expands slightly on John's reluctance but retains the core elements, including the descending Spirit like a dove; and Luke 3:21–22 parallels this, emphasizing Jesus' prayer during the event while echoing the divine affirmation. Similarly, the feeding of the 5,000 demonstrates verbatim overlaps, as seen in Mark 6:30–44's account of the disciples' report, Jesus' compassion for the crowd, and the multiplication of five loaves and two fish to satisfy thousands; Matthew 14:13–21 mirrors this structure and phrasing, adding details on seating the crowd in groups; and Luke 9:10–17 follows suit, noting the location near Bethsaida and the gathering of leftovers in twelve baskets. Quantitative analysis underscores the scale of these overlaps, with approximately 90% of Mark's content reproduced in Matthew and about 50% in Luke, the majority falling within the triple tradition. This shared material spans roughly 58 distinct sections, comprising hundreds of verses that align closely in vocabulary and narrative flow, as detailed in harmonized synopses of the Gospels. Such statistics highlight how Mark's 661 verses are largely absorbed into the longer frameworks of Matthew (1,068 verses) and Luke (1,149 verses), often with minimal alteration. The triple tradition pericopes can be categorized by genre, including miracle stories like healings and nature , narrative sequences such as controversies with religious leaders and the journey to , and the extended passion narrative detailing ' arrest, trial, crucifixion, and appearances. The passion narrative alone accounts for a substantial portion of the agreements, with over 200 verses exhibiting high verbal identity across the three accounts, from the to the . These categories reveal a structured parallelism, particularly in the overall ' ministry, from teaching to Jerusalem's climax. Scholars first systematically observed and documented these Synoptic similarities in the , with Jakob Griesbach coining the term "Synoptic" in his synopsis and emphasizing the evident verbal and sequential correspondences as a puzzle warranting . Griesbach's work built on earlier notices by figures like Gottlob Christian , marking the onset of modern critical inquiry into the Gospels' interrelations.

Differences Requiring Explanations

The differences among the —Matthew, Mark, and Luke—extend beyond their shared material to include unique content and divergences in , phrasing, and inclusion that complicate efforts to trace their literary relationships. These discrepancies, including special traditions, underscore the Synoptic Problem by suggesting independent sources or editorial choices that cannot be fully explained by direct copying alone. For instance, while the triple tradition accounts for narrative parallels across all three, the double tradition highlights material exclusive to Matthew and Luke, absent from Mark, consisting primarily of ' sayings and teachings. The double tradition encompasses approximately 200 verses of shared sayings material between Matthew and Luke, predominantly ethical teachings, parables, and discourses not found in Mark. This body of text, hypothesized to derive from a , includes prominent examples such as the , where Matthew presents a more expansive list emphasizing spiritual blessings (Matt 5:3–12) compared to Luke's shorter, more temporally oriented version (Luke 6:20–23), and the , with Matthew's fuller petitionary form (Matt 6:9–13) contrasting Luke's briefer rendition (Luke 11:2–4). These parallels in content but differences in wording and context illustrate how each evangelist adapted the material to their theological emphases. In addition to the double tradition, each Gospel contains unique material attributed to special sources: "M" for Matthew's peculiar content and "L" for Luke's. Matthew's M source includes distinctive narratives like the infancy story of Jesus' birth and visit by the (Matt 1:18–2:23), which emphasize fulfillment of Jewish prophecy. Luke's L source features parables such as the Good Samaritan (Luke 10:25–37), highlighting themes of and social reversal absent elsewhere. These special traditions comprise roughly 30 sections in Matthew and 25 in Luke, mostly oral traditions shaped by the evangelists. Key differences further highlight the complexity, including variations in narrative order, such as Mark's abrupt conclusion at the without post-resurrection appearances (Mark 16:8), which Matthew extends with the (Matt 28:16–20) and Luke with and ascension accounts (Luke 24:13–53). Wording divergences are evident in the in Matthew (Matt 5–7), a comprehensive ethical delivered on a mountain, versus the briefer in Luke (Luke 6:17–49), set on level ground with a focus on . Omissions and additions also play a role; for example, Luke largely omits Mark's "Messianic Secret" motif, where repeatedly commands silence about his identity (e.g., Mark 1:34, 8:30), reducing emphasis on secrecy in favor of open proclamation. These elements collectively demand source-critical explanations to account for the evangelists' selective use and adaptation of traditions.

Historical Development

Early Precursors

In the late , scholarly attention to the literary relationships among the began to lay the groundwork for later source theories. Johann Jakob Griesbach's Synopsis Evangeliorum, first published in 1774 and reissued separately in 1776, arranged the texts of Matthew, Mark, and Luke in parallel columns to facilitate comparison, thereby highlighting extensive verbal parallels and structural similarities that suggested interdependence rather than independent composition. This innovative format moved beyond traditional harmonies by emphasizing observable textual overlaps, prompting deeper analysis of how the evangelists might have drawn from common traditions or each other. Griesbach expanded these observations in his Commentatio qua Marci Evangelium totum e Matthaei et Lucae commentariis excerptum esse monstratur (1789–1790, with supplements in 1794), where he argued that Mark served as an abbreviation or of both Matthew and Luke, synthesizing their material into a more concise narrative. While this positioned Mark as secondary—contrasting with emerging views of its priority—Griesbach's work underscored the need to explain the Gospels' agreements through literary borrowing, influencing subsequent debates on . During the 1770s and 1780s, figures like Johann Salomo Semler and contributed early ideas on mutual dependence and hypothetical sources. Semler, in his historical-critical approach to the , proposed that the Synoptic writers engaged in reciprocal borrowing, reflecting evolving oral and written traditions rather than direct eyewitness accounts. Complementing this, Lessing's 1778 publication at identified a lost "Nazarene Gospel" as the underlying source for all three Synoptics, an original that the evangelists adapted into Greek, thereby accounting for their shared content without assuming direct copying. These suggestions shifted focus from isolated compositions to interconnected textual histories, setting the stage for more systematic hypotheses. The 19th century saw further advancements with Karl Lachmann's 1835 essay "De ordine narrationum in evangeliis synopticis," which analyzed the sequence of events across the Synoptics to argue for Mark's chronological priority. Lachmann observed that Matthew and Luke often preserved Mark's narrative order while introducing rearrangements for thematic purposes, and he noted that Mark retained "hard sayings"—difficult, unpolished, or theologically challenging elements—more intact than the smoother versions in the other two, suggesting Mark as the primitive base from which they expanded. This emphasis on order and textual primitiveness challenged Griesbach's model and bolstered the case for Mark as the foundational . Independently in 1838, Christian Gottlob Wilke advanced these ideas in Der Urevangelist, oder exegetisch-kritische Untersuchung über das Verwandtschaftsverhältnis der drei ersten Evangelisten, positing Mark as the earliest and proposing a supplementary "logia source"—a collection of ' sayings—to explain the double tradition shared uniquely by Matthew and Luke. Wilke's detailed comparison of vocabulary, style, and omissions demonstrated Mark's role as a framework, with the logia providing the sayings material omitted or altered in Mark, paralleling contemporaneous arguments by Christian Hermann Weisse and marking a pivotal step toward the formalized two-source theory.

19th- and 20th-Century Formulation

The formal articulation of the two-source hypothesis emerged in the , with Christian Hermann Weisse's publication Die evangelische Geschichte, kritisch und philosophisch bearbeitet marking the first explicit model. Weisse posited that the Gospels of Matthew and Luke independently drew upon the Gospel of Mark as a primary source and a hypothetical collection of ' sayings, later termed , to explain the shared non-Markan material between them. This framework built directly on Christian Gottlob Wilke's contemporaneous work Der Urevangelist, which had already advocated for Markan priority, but Weisse integrated it into a comprehensive solution to the Synoptic Problem by emphasizing the independence of Matthew and Luke in their use of these sources. Heinrich Julius Holtzmann refined and popularized the hypothesis in his 1863 monograph Die synoptischen Evangelien: Ihr Ursprung und geschichtlicher Charakter, embedding it within the broader theological framework of the Tübingen School led by . Holtzmann strengthened the case for by analyzing the stylistic simplicity of Mark compared to the expansions in Matthew and Luke, arguing that Mark served as the foundational narrative from which the later evangelists derived and elaborated their accounts. His work not only delineated the contours of the two-source model—Mark plus —but also incorporated historical-critical methods to trace the evangelists' redactional tendencies, making the hypothesis a cornerstone of 19th-century German biblical scholarship. In the early 20th century, extended the two-source hypothesis into the "" in his influential 1924 book The Four Gospels: A Study of Origins, introducing special sources (unique to Matthew) and (unique to Luke) to account for the evangelists' distinct traditions. Streeter supported this expansion with statistical analyses of verse overlaps—such as Matthew reproducing approximately 90% of subject matter while adding over 230 verses from —and geographical arguments linking to a Jewish-Christian community in Antioch around A.D. 85 and to Caesarea circa A.D. 80–85, reflecting localized oral and written developments. These arguments, grounded in evidence and pericopal distributions, reinforced the core two-source model while providing a more nuanced explanation for the Synoptics' compositional diversity. By the mid-20th century, the two-source hypothesis achieved widespread consensus among scholars, particularly through its adoption in form-critical studies. Rudolf Bultmann's 1921 Die Geschichte der synoptischen Tradition assumed the model as a foundation for analyzing the oral prehistory of the Synoptic traditions, treating Mark and as key repositories of form-critical units like apophthegms and miracle stories. Similarly, Vincent Taylor's 1954 The Life and upheld the hypothesis in reconstructing ' historical ministry, using Markan priority and Q to evaluate the reliability of sayings material while emphasizing the evangelists' theological adaptations. This acceptance by leading form critics like Bultmann and Taylor solidified the two-source theory as the dominant paradigm in mainstream scholarship through the mid-century.

Core Principles

Marcan Priority

The hypothesis posits that the Gospel of Mark was composed first among the , approximately 65–70 CE, serving as a that the authors of Matthew and Luke independently expanded, revised, and incorporated into their own works. This foundational element of the two-source theory explains the extensive overlap in narrative content across the Synoptics, where Matthew reproduces about 92% of Mark's material and Luke about 58% while adding unique elements. Scholars argue for Mark's primitiveness based on its brevity, with only 661 verses compared to Matthew's 1,071, suggesting it represents a core framework later augmented by the other evangelists. Mark retains "hard sayings" that appear challenging or theologically raw, such as Jesus' response in Mark 10:18—"Why do you call me good? No one is good except God alone"—which Matthew softens in the parallel (Matt 19:17) to emphasize Jesus' authority without the stark implication. Furthermore, Mark's unpolished Greek, marked by colloquialisms, grammatical roughness, and repetitive phrasing, contrasts with the more refined styles of Matthew and Luke, indicating an earlier, less edited composition. Examples of dependence are evident in how Matthew and Luke refine Mark's awkward constructions; for instance, :12 repeats "immediately" in a stilted manner ("Immediately the Spirit drove him out into the . Immediately..."), which both Matthew (4:1) and Luke (4:1) streamline for smoother narrative flow. Similarly, Mark's concise passion prediction in 8:31—" must suffer many things... be killed, and after three days rise again"—is expanded in :21 with details like by Judas and on the third day, illustrating independent elaboration on Mark's base text. This chronology aligns with Mark's composition shortly after the destruction of the Temple in 70 CE, as reflected in passages like :2 predicting its fall, positioning it as a post-event reflection that influenced the later Synoptics. thus complements the role of the in accounting for non-Markan agreements between Matthew and Luke.

The Q Source

The Q source, derived from the German word Quelle meaning "source," is posited as a hypothetical written document in Greek consisting primarily of logia (sayings) attributed to , serving as a common source for the Gospels of Matthew and Luke independent of Mark. Scholars date Q to approximately 50–60 CE, likely originating in a Jewish-Christian community in or southern Syria, and it notably lacks any passion narrative or accounts of ' death and . Its reconstruction relies on the "double tradition," the material shared verbatim or nearly so between Matthew and Luke but absent from Mark, comprising about 235–266 verses or roughly 4,500 words in total. The International Q Project, a collaborative scholarly effort, has produced a critical edition assigning confidence levels (A–D) to reconstructed passages, with uncertain elements marked by double brackets. The contents of Q center on Jesus' teachings, including the temptation narrative (Q 4:1–13), which parallels Matthew 4:1–11 and Luke 4:1–13, depicting Jesus' encounter with in the wilderness. A major section is the (Q 6:20b–49), encompassing and woes (Q 6:20–26), love for enemies (Q 6:27–36), and parables like the wise and foolish builders (Q 6:47–49), akin to elements of Matthew's . Parables feature prominently, such as the (Q 13:18–19), illustrating the kingdom of God, and the rich fool (Q 12:13–21), emphasizing ethical priorities. Other key elements include the (Q 11:2–4) and sayings on (Q 7:18–35), forming a cohesive collection without extended biographical narratives. Q's characteristics reflect a sayings genre focused on didactic and exhortatory material, with an overarching apocalyptic tone evident in pronouncements like Q 17:23–37, which warns of the sudden arrival of and impending judgment. This tone underscores themes of eschatological urgency and divine reversal, as in the blessing the poor and hungry. Miracles are minimally represented, limited to a few healings such as the centurion's servant (Q 7:1–10) and the mute demoniac (Q 11:14), without broader wonder-working episodes that dominate Mark. The document emphasizes ethical instruction, prophetic critique, and wisdom traditions over historical or salvific events. As a hypothetical construct, Q's text is inferred solely from alignments in the double tradition, with no surviving , leading to debates on its precise form and extent. Proposed stratifications suggest an evolutionary composition: an early layer of sayings (e.g., Q 6:20b–49, focusing on sapiential teachings and kingdom ) expanded into later prophetic material (e.g., Q 11:39–52, with woes against , and Q 13:34–35, lamenting ), incorporating apocalyptic and deuteronomistic elements amid community crises. This layered model, advanced by redaction-critical analysis, posits Q's growth from a foundational sayings collection to a more judgmental, prophetic document by the 60s CE.

Supporting Evidence

Literary Dependence Arguments

One key argument for the literary dependence of Matthew and Luke on Mark is the general adherence to sequence of pericopes, or units, in the triple tradition material shared by all three gospels. For instance, the calling of the first disciples appears in :16-20 and is closely mirrored in Matthew 4:18-22 and :1-11, preserving order while allowing insertions of material elsewhere. Streeter observed that "the relative order of incidents and sections in Mark is in general supported by both Matthew and Luke; where either of them deserts Mark, the other is usually found supporting him," indicating foundational role as an intermediary source. This pattern holds across much of the framework, with deviations typically attributable to the integration of non-Markan material from , such as sayings collections placed in different contexts. Verbal agreements in the triple tradition further demonstrate copying from Mark, with high rates of identical wording that exceed what would produce. In passages common to all three gospels, such as the temptation narrative or the healing of the paralytic, Matthew and Luke often reproduce Greek phrasing verbatim or with minor modifications, achieving overlap rates of 50-90% in key sections. For example, Abakuks's analysis of aggregated verbal agreements across 1,852 words present in all three gospels shows patterns consistent with direct dependence on Mark, where the probability of independent composition is statistically improbable. These agreements are not uniform but cluster in narrative blocks, suggesting mechanical copying rather than parallel oral traditions. Matthew's expansion patterns reflect a redactional tendency to elaborate on Markan material with didactic additions, often organizing it into structured teaching blocks. Notably, Matthew incorporates approximately five major discourse sections, such as the (Matthew 5-7), which expands Mark's briefer accounts by conflating them with sayings; Streeter noted that "Matthew is conflating two separate discourses, one from practically identical with Luke’s , the other from ," resulting in a compressed use of about 11/12 of Mark's content while adding interpretive layers. This approach prioritizes thematic grouping over strict chronology, as seen in rearrangements of the first half of Mark's order, yet maintains overall dependence. In contrast, Luke exhibits a of historicizing expansions, particularly in the central travel narrative (Luke 9:51-19:27), where Q material is inserted into framework to create a prolonged journey to . This section integrates blocks of Q sayings and unique L material, with Luke following one source at a time rather than conflating; for instance, Streeter highlighted that "there are never more than four, and rarely more than two, consecutive verses in any of the Q sections which do not also occur in Matthew," but Luke substitutes or expands them to emphasize historical progression. Such insertions explain deviations from sequence without disrupting the broader narrative dependence. Statistical models reinforce these observations by quantifying dependence through verbatim indices and clustering analysis. Honoré's triple-link model, which assesses probabilities of word transmission between gospels, supports Markan priority by showing high goodness-of-fit ratios (e.g., 0.952-1.028) for scenarios where Matthew and Luke draw from Mark, with deviations explained by Q insertions. Clustering techniques on verbal agreements further cluster triple tradition passages around Mark as the central node, indicating it as the intermediary source rather than a derivative. These methods, applied to datasets of common Greek words, yield low probabilities for independent origins, bolstering the two-source framework.

Stylistic and Redactional Analysis

Redaction criticism, a method that analyzes how the evangelists edited their sources to convey theological perspectives, supports the Two-source hypothesis by revealing distinct styles in Matthew and Luke as they adapted material from Mark and the hypothetical . This approach highlights how each evangelist reshaped narratives and sayings to align with their communities' concerns, demonstrating independent use of shared sources rather than direct dependence on one another. Matthew's redaction emphasizes the fulfillment of Jewish scripture, often inserting fulfillment formulas absent in Mark to underscore Jesus as the Messiah completing Old Testament prophecies. For instance, after Jesus heals many and withdraws to avoid fame (Matthew 12:15–16), Matthew adds "this was to fulfill what was spoken through the prophet " (Matthew 12:17), quoting :1–4 to link the servant's gentle ministry to Jesus' actions. This editorial layer reflects Matthew's audience-oriented focus on Jewish continuity and eschatological completion. In contrast, Luke's redaction prioritizes themes of universal appealing to a readership, portraying Jesus' ministry as inclusive and extending to all nations. Luke modifies Markan accounts to highlight and mercy, such as the (Luke 10:25–37), unique to Luke's special material (L), to illustrate neighborly love beyond ethnic boundaries, and emphasizing the centurion's as a model for Gentiles (Luke 7:1–10). These changes underscore Luke's vision of salvation history progressing from to the wider world. Both evangelists engage in linguistic polishing, smoothing Mark's rougher Greek, which includes Semitisms and redundancies, to produce more elegant prose suited to their literary aims. A representative example is the healing of the paralytic: Mark's command, "I tell you, get up, take your mat and go home" (Mark 2:11), is refined in Matthew to "Get up, take your mat and go home" (Matthew 9:6), eliminating redundancy while maintaining the narrative flow; Luke similarly streamlines it for clarity (Luke 5:24). This editing reduces Mark's frequent use of "immediately" (euthys, appearing over 40 times) and other repetitive elements, enhancing readability without altering core content. The integration of Q material further illustrates their distinct redactional approaches: Matthew organizes Q sayings into structured discourses, such as the (–7), which compiles teachings on and discipleship into a cohesive block to emphasize ' authoritative instruction for the community. Luke, however, scatters these same Q elements chronologically throughout his narrative, as seen in the (:20–49), to fit his ordered account of ' journey to and highlight progressive revelation. This divergence in arrangement supports the hypothesis of independent editing of a common sayings source. Theologically, Matthew's imposes an ecclesial structure on Markan and Q material, using terms like "church" (ekklēsia) to outline community organization and discipline (e.g., Matthew 16:18, 18:17), adapting Mark's urgent apocalyptic tone to a post-resurrection of ongoing mission. Luke preserves elements of Mark's eschatological urgency but tempers the imminent parousia by introducing delays and expansions, such as the of the pounds (Luke 19:11–27) instead of Mark's talents (:32–37), to encourage perseverance amid deferred expectations in a Gentile-inclusive framework. These motivations reveal how each evangelist tailored the sources to address their respective theological priorities.

Criticisms

Minor Agreements

The minor agreements in the consist of textual instances where Matthew and Luke share wording, phrasing, or omissions that diverge from Mark in passages common to all three evangelists, known as the triple tradition. These agreements are generally minor in nature—often involving single words, short phrases, or structural choices—but their cumulative presence poses challenges to the two-source hypothesis by questioning the assumed independence of Matthew and Luke in their use of Mark. Scholars have cataloged these agreements in varying numbers, with estimates ranging from around 230 significant cases to over 1,000 instances when including trivial verbal parallels, depending on the criteria employed for identification. They are distributed across approximately 91 percent of the triple-tradition sections, occurring in 7-12 percent of the material by some analyses, which raises concerns about potential direct literary contact between Matthew and Luke beyond the posited sources. The agreements can be categorized into types such as omissions, where both Matthew and Luke independently excise Markan details; alterations in wording for stylistic or theological reasons; and occasional additions that align the two against Mark. For example, in the discourse on the leaven of the Pharisees (Mark 8:14-21), both Matthew (16:5-12) and Luke (12:1) omit Mark's extended questioning about the disciples' lack of bread and simplify the repetition of numerical motifs, streamlining the narrative in similar ways. Another instance involves a word change in the entry into Jerusalem: Mark 11:1-2 describes a "colt" without further qualification, whereas both Matthew 21:2 and Luke 19:30 specify a "colt that had never been ridden," introducing a detail evoking Zechariah 9:9. A further example is the omission of Mark's phrase "after I am raised up" from the prediction in 14:28; while Matthew 26:32 retains a version of it, Luke entirely omits the verse, but both evangelists avoid Mark's full temporal clause in related resurrection predictions, aligning against Mark's wording. Interpretively, these minor agreements prompt debate over whether they result from redactional convergence—independent editorial decisions by Matthew and Luke when adapting Mark—or indicate some form of dependency between the two evangelists, such as Luke consulting Matthew or a shared intermediate tradition. Proponents of the two-source theory often attribute them to coincidental tendencies or textual variants in Mark's transmission, but critics argue that their frequency and specificity undermine the model's strict separation of sources, suggesting alternative explanations like mutual influence.

Challenges to Q

One major challenge to the Q source hypothesis is the complete absence of any manuscript evidence supporting its existence. Unlike the Gospel of Mark, which survives in thousands of ancient manuscripts, or even reconstructed hypothetical texts like Marcion's Gospel, which patristic writers such as and Epiphanius describe in detail, no fragments, quotations, or allusions to Q appear in early or archaeological records. This lack of direct attestation raises questions about Q's historical reality, as scholars like Christopher Tuckett have noted that the hypothesis relies heavily on indirect inferences from Matthew and Luke rather than verifiable textual witnesses. Similarly, Barry D. Smith argues that this evidentiary gap undermines Q's explanatory power compared to sources with tangible support, potentially rendering it an unnecessary construct in synoptic criticism. Attempts to stratify Q into developmental layers have also faced significant criticism for methodological circularity. John S. Kloppenborg's influential model posits a three-layer structure for Q—a formative layer (Q¹), a sapiential deuteronomic layer (Q²), and a final apocalyptic (Q³)—based on perceived shifts in , tone, and within the reconstructed double tradition. However, critics contend that this approach presupposes the very compositional history it seeks to demonstrate, as the layering depends on subjective assessments of Matthean and Lukan that may simply reflect the evangelists' own editing rather than distinct Q stages. Tuckett highlights this issue, observing that such stratification risks by using -critical assumptions to build a multi-stage Q while those assumptions derive from the posited layers themselves. This debate persists, with some scholars viewing the model as innovative yet vulnerable to overinterpretation of sparse material. Linguistic analysis of reconstructed Q further complicates its viability as an independent source, revealing inconsistencies that suggest derivation from one evangelist rather than a neutral antecedent. The Greek style of Q often incorporates vocabulary, syntax, and phrasing characteristic of both Matthew and Luke, such as Matthean preferences for certain Semitisms or Lukan tendencies toward Hellenistic polish, which implies that the double tradition may stem from mutual dependence rather than a shared, uninfluenced . Mark Goodacre points out that these hybrid features—evident in passages like the or the —align more plausibly with one influencing the other, as an autonomous Q would likely exhibit a more uniform, distinct idiom free from such evangelistic imprints. This linguistic blending challenges the assumption of Q's priority and independence within the two-source framework. Theological tensions in Q, particularly its apparent lack of a passion narrative, pose another obstacle, as it contrasts with the early church's emphasis on Jesus' death and . Q's focus on sayings, wisdom teachings, and eschatological pronouncements without reference to the or seems at odds with the kerygmatic core of primitive , prompting questions about whether such a source could have circulated widely or represented a complete . Recent studies on Luke's doublets—pairs of similar sayings or events, such as the mission discourses—exacerbate this by suggesting that apparent Q material may derive from Lukan or other influences, undermining Q's theological unity and coherence. For instance, Wolfgang Grünstäudl's 2021 analysis argues that these doublets indicate Luke's creative handling of traditions rather than faithful reproduction of a unified Q, further questioning the source's internal consistency and historical fit within early .

Variants

Four-Source Extensions

The four-source hypothesis extends the two-source theory by incorporating two additional hypothetical documents to account for material unique to the Gospels of Matthew and Luke. Proposed by British scholar in his 1924 work The Four Gospels: A Study of Origins, this model posits that Matthew drew from Mark, , and a special source denoted as M, while Luke utilized Mark, , and a distinct source called L. M encompasses approximately 230 verses of content peculiar to Matthew, including the infancy narratives (–2), the genealogy in , Judaistic sayings such as "I was not sent but unto the lost sheep of the House of " (Matthew 15:24), and anti-Pharisaic polemics that reflect a strong emphasis on Jewish legal traditions. In contrast, L comprises over 400 verses unique to Luke, featuring parables like the Good Samaritan and the Prodigal Son, the (Luke 1:26–38), additional infancy material, and narratives such as the encounter with , highlighting themes of mercy and outreach to Gentiles. Streeter provided a geographical and cultural rationale for these special sources, arguing that M originated in a Palestinian Jewish context, likely associated with traditions among early Christian refugees who fled to Antioch around 66 CE following the Jewish-Roman War. This source's apocalyptic tone and Petrine influences align with post-70 CE Jewish-Christian communities emphasizing fidelity to Mosaic . L, on the other hand, reflects an Antiochene Hellenistic environment, possibly linked to Caesarea, with its more universalistic outlook suited to a diverse, Greco-Roman audience. These regional distinctions explain stylistic variations, such as M's Hebraic phrasing versus L's polished Greek narratives. In modern scholarship, Streeter's model remains influential, with ongoing discussions of textual transmission informed by early papyri such as P75 (ca. 200 CE), which provides evidence for the early form of Luke's Gospel. A key strength of the four-source extension lies in its comprehensive coverage of all Synoptic material—over 90% of Mark plus shared and unique elements—attributing differences to written sources rather than relying solely on oral traditions, thus providing a more systematic explanation for literary agreements and discrepancies. This approach has remained influential, offering a framework that aligns with manuscript evidence and historical church traditions.

Oral Q Modifications

The hypothesis modifies the two-source theory by proposing that the , rather than being a fixed written , consisted of a fluid collection of ' sayings transmitted verbally among early Christian communities. This view, influenced by scholars such as Werner Kelber and alongside James D. G. Dunn's work on and orality, emphasizes the dynamic nature of oral transmission in a predominantly illiterate society, where sayings were adapted and performed in various contexts before being incorporated into the Gospels of Matthew and Luke. Dunn, in his analysis of and orality, argues that such verbal traditions better account for the shared material in the double tradition, allowing for natural variations without requiring a single, uniform textual source. One key implication of this hypothesis is its ability to explain textual discrepancies in the double tradition, such as the differing wording of the Beatitudes in Matthew (e.g., "Blessed are the poor in spirit" in Matt 5:3) and Luke (e.g., "Blessed are you who are poor" in Luke 6:20), as products of performative adaptation rather than errors in copying a written Q. This fluidity aligns with ethnographic studies of oral cultures, where core elements of teachings are preserved amid contextual modifications, thus addressing criticisms of the written Q model regarding verbatim agreements and minor agreements. By positing Q as oral (often denoted as "q"), the hypothesis retains the explanatory power of the two-source framework while mitigating evidential challenges posed by the absence of Q manuscripts. Recent scholarship since 2020 has further developed this perspective, highlighting performative orality in through interdisciplinary approaches combining and . For instance, contributions in the proceedings of the 2022 Synoptic Problem conference emphasize how oral performances shaped the sayings tradition, influencing Matthew's and Luke's redactions independently of Mark. Similarly, analyses in broader synoptic studies underscore the role of communal memory in stabilizing key logia amid verbal transmission. This oral Q modification integrates seamlessly with the two-source hypothesis by upholding Marcan priority while adapting Q to the realities of first-century Jewish oral culture, where literacy rates were estimated at only 3-5% among the population. Archaeological and epigraphic evidence from Roman Palestine, including limited inscriptions and the scarcity of personal documents, supports a context dominated by verbal exchange, making written composition of a sayings source less probable in the earliest decades of . Thus, the hypothesis bridges literary dependence arguments with sociocultural evidence, offering a nuanced solution to the synoptic interrelations.

Alternative Hypotheses

Farrer Hypothesis

The , proposed by Austin Farrer in his 1955 essay "On Dispensing with Q," posits that the Gospel of Mark was composed first, followed by the Gospel of Matthew, which expanded upon Mark, and then the Gospel of Luke, which drew directly from both Mark and Matthew to account for the material shared between Matthew and Luke (known as the double tradition). Farrer argued that this sequential dependence eliminates the need for a hypothetical sayings source () in the two-source hypothesis, as Luke could have accessed and redacted Matthean material to create his own narrative structure. Michael Goulder further elaborated on the hypothesis in his 1974 book Midrash and Lection in Matthew, suggesting that Matthew's expansions of Mark followed patterns of Jewish midrashic interpretation and lectionary cycles, which Luke could then adapt in turn. The core argument centers on explaining the double tradition through Lukan redaction of Matthew's sayings and arrangements, rather than a lost document; for instance, the shared order of the temptations in the wilderness (Matthew 4:1–11 and Luke 4:1–13) reflects Luke's deliberate rearrangement of Matthean elements for thematic purposes, such as emphasizing Jesus' journey to Jerusalem. This approach posits that Luke, as a creative editor, "unpicked" and repositioned Matthean content to fit his orderly account (Luke 1:3), avoiding the complexities of positing an additional source. Supporting evidence includes indications of Luke's familiarity with Matthean narrative contexts, such as the placement of the Lord's Prayer. In Matthew 6:9–13, the prayer appears within the Sermon on the Mount amid teachings on piety and forgiveness, while Luke 11:1–13 integrates a shorter version prompted by a disciple's request, blending it with parables on prayer that echo Matthean themes—suggesting Luke knew and modified Matthew's contextual framework rather than drawing from an independent Q. By relying solely on the canonical Gospels, the hypothesis avoids multiplying hypothetical documents, aligning with Occam's razor in textual criticism and explaining agreements in wording and sequence without invoking lost texts. For example, a analysis of Luke's doublets ( accounts of similar events) highlights how Farrer proponents interpret these as of Lukan of Matthean material, bolstering the case against Q. This perspective has gained traction as an elegant alternative addressing longstanding issues with the two-source model's reliance on Q.

Griesbach Hypothesis

The Griesbach hypothesis, also known as the , posits that the Gospel of Matthew was composed first around 70 CE, followed by the Gospel of Luke, which drew upon Matthew as a , and finally the Gospel of Mark, which served as an and of the preceding two gospels. This sequence accounts for Mark's shorter length and its tendency to alternate between material resembling Matthew and Luke, interpreting such patterns as evidence of Markan epitomization rather than primitive composition. Proponents argue that this model resolves apparent literary dependencies without invoking hypothetical documents, emphasizing direct use of existing gospels. The hypothesis originated with the German biblical scholar Johann Jakob Griesbach (1745–1812), who first outlined it in his 1789 treatise Commentatio qua Marci Evangelium totum e Matthaei et Lucae commentariis decerptum esse monstratur, building on his innovative 1776 Greek synopsis of the synoptics that facilitated comparative analysis. Griesbach modified earlier patristic views, such as Augustine's, by affirming that while Luke utilized Matthew, Mark subsequently excerpted and harmonized both for brevity. The theory gained renewed attention in the mid-20th century through William R. Farmer's 1964 monograph The Synoptic Problem: A Critical Analysis, which systematically defended it against dominant Marcan priority models and sparked ongoing debate. A central strength of the Griesbach hypothesis lies in its alignment with early church tradition regarding Matthean priority, as early fathers like , , and Augustine consistently affirmed Matthew as the initial gospel, with subsequent writers adapting it. It further explains Mark's notable omissions—such as the infancy narratives, the in full, and extended resurrection accounts—as deliberate editorial choices to produce a streamlined suited for Roman audiences or liturgical use. Regarding minor agreements between Matthew and Luke against Mark, advocates propose these result from Mark's smoothing and process, harmonizing divergences in the sources he abbreviated. Today, the Griesbach hypothesis represents a minority perspective in synoptic studies, overshadowed by the two-source theory, though it continues to inform neo-Griesbach variants that refine its literary and theological implications. Critics contend that it undervalues apparent primitiveness, including its unpolished Greek, vivid details, and abrupt style, which suggest an earlier origin rather than a later abbreviation. Despite these challenges, the hypothesis persists in discussions of interrelations, particularly among scholars emphasizing canonical order and patristic testimony.

References

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