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The term "direction of fit" is used in the philosophy of intentionality to distinguish between types of representations. It is commonly applied in two related senses: first, to distinguish the mental states of belief and desire;[1] and second, to distinguish between types of linguistic utterances, such as indicative and imperative sentences.[2]

First, philosophers of mind distinguish between mind-to-world (i.e., mind-to-fit-world) and world-to-mind (i.e., world-to-fit-mind) directions of fit. In the former, mental states such as beliefs are subject to updates in order to fit evidence provided by the world (the mind changes to fit the world, thus beliefs have a mind-to-world direction of fit). In the latter, mental states such as desires motivate the agent to change the world in order to fit the desired state in the mind (the world changes to fit the mind, thus desires have a world-to-mind direction of fit).[3]

Similarly, philosophers of language, in particular advocates of speech act theory such as John Searle, distinguish between word-to-world and world-to-word directions of fit. In the former, utterances such as indicative sentences attempt to describe the world; for a statement, the state of affairs is considered appropriate if the content expressed by the words fit the way the world really is (a word-to-world direction of fit). In the latter, utterances such as imperative sentences attempt to cause a change in the world; for an order, the state of affairs is considered appropriate when the world changes to fit the words (a world-to-word direction of fit).[4]

In both cases, the issue is how representations are considered satisfactory. Beliefs and descriptive statements are considered satisfactory when the states of affairs they represent match the world; i.e. when they are true. Desires and orders are considered satisfactory when world matches the state of affairs they represent; i.e. when they are fulfilled.[5]

Overview

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In philosophy of mind, a belief has a mind-to-world direction of fit.[6] A belief (that p, say) depicts the world as being in a state of affairs such that p is true. Beliefs, some philosophers have argued,[7] aim at the truth and so aim to fit the world. A belief is satisfied when it fits the world.

A desire, on the other hand, normally expresses a yet to be realized state of affairs and so has a world-to-mind direction of fit.[8] A desire that p, unlike a belief, doesn't depict the world as being in the state that p; rather it expresses a desire that the world be such that p is true. Desire is a state that is satisfied when the world fits it.

A way to account for the difference is that a (rational) person that holds the belief that p when confronted with evidence that not-p, will revise his belief, whereas a person that desires that p can retain his desire that p in the face of evidence that not-p.[who?]

To a philosopher of language[who?] a word-to-world fit occurs when, say, a sports journalist correctly names Jones as a goal scorer; while if the journalist mistakenly names Smith as the goal scorer, the printed account does not display a word-to-world fit, and must be altered such that it matches the real world. Conversely, a world-to-word fit occurs when a fan of Smith's team opines that they deserved to win the match, even though they lost. In this case, the world would have to change to make the sports fan's wish become true.

However, in the case of, say, a judge delivering a death sentence to a criminal declared guilty by a jury, the utterances of the judge alter the world, through the fact of that utterance;[citation needed] and, in this case, the judge is generating a world-to-word-to-world fit (see below). So, if the judge's opinion is upheld, the world must be altered to match the content of the judge's utterance (i.e., the criminal must be executed).

In medieval philosophy

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According to Thomas Aquinas (Summa Theologica, Part I, Question 21, Article 2), there are two kinds of "truth" (veritas), both understood as correspondence between mind (intellectus) or words (oratio) and world ("things", res):

Truth consists in the equation of [thing and mind] (adaequatio rei et intellectus), as said above. Now the mind, that is the cause of the thing, is related to it as its rule and measure; whereas the converse is the case with the mind that receives its knowledge from things.

When, therefore, things are the measure and rule of the mind, truth consists in the equation of the mind to the thing, as happens in ourselves. For according as a thing is, or is not, our thoughts or our words about it are true or false.

But when the mind is the rule or measure of things, truth consists in the equation of the thing to the mind; just as the work of an artist is said to be true, when it is in accordance with his art. Now as works of art are related to art, so are works of justice related to the law with which they accord. Therefore, God's justice, which establishes things in the order conformable to the rule of His wisdom, which is the law of His justice, is suitably called truth. Thus, we also in human affairs speak of the truth of justice. (emphasis added to original)

In philosophy of language

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Perhaps the first to speak of a "direction of fit" was the philosopher J. L. Austin. Austin did not use the distinction between different directions of fit to contrast commands or expressions of intention to assertions, or desires to beliefs. He rather distinguishes different ways of asserting that an item is of a certain type.[9]

In a detailed analysis [10] of the distinctions between various scenarios, such as (a) mislabeling a triangle as a square (which Austin regarded as an act of linguistic violence) and (b) inaccurately describing a triangular object as a square (which Austin considered an act of factual violence), Austin introduced a conceptual differentiation. He labeled these distinctions as follows:

  • "the onus of match": in the case of one wanting to match X and Y, the distinction between the matching of X to Y and the matching of Y to X; and
  • "the direction of fit": in the case of naming something, the difference between the fitting of a name to an item, and the fitting of an item to a name.

The concept of direction of fit can also apply to speech acts: e.g., statements, guesses and conjectures have word-to-world direction of fit, while commands and promises have a world-to-word direction of fit.

John Searle and Daniel Vanderveken[11] assert that there are only four possible "directions of fit" in language:

1. The word-to-world direction of fit.
In achieving success of fit the propositional content of the utterance fits an independently existing state of affairs in the world. E.g.: "We are married".
2. The world-to-word direction of fit.
To achieve success of fit the world must change to match the propositional content of the utterance. E.g.: "Will you marry me?", "I want to marry him", "You'd just better marry her, buddy!", etc.
3. The double direction of fit.
To achieve success of fit the world is thereby altered to fit the propositional content by representing the world as being so altered, unlike sense 2. E.g.: "I declare you man and wife". The 'doubled' direction is therefore always world-to-word-to-world. For obvious reasons, Searle calls sentences of this type 'declarations'.
4. The null or empty direction of fit.
There is no direct question of achieving success of fit between the propositional content and the world, because success of fit is presupposed by the utterance. E.g.: "I'm glad I married you" presupposes that the speaker is married to the listener.

Searle used this notion of "direction of fit" to create a taxonomy of illocutionary acts.[12]

Although Elizabeth Anscombe never employed the term "the direction of fit", Searle has strongly argued[13] that the following passage from her work Intention was, by far, "the best illustration" of the distinction between the tasks of "[getting] the words (more strictly their propositional content) to match the world... [and that of getting] the world to match the words":

§32. Let us consider a man going round a town with a shopping list in his hand. Now it is clear that the relation of this list to the things he actually buys is one and the same whether his wife gave him the list or it is his own list; and that there is a different relation where a list is made by a detective following him about. If he made the list itself, it was an expression of intention; if his wife gave it him, it has the role of an order. What then is the identical relation to what happens, in the order and the intention, which is not shared by the record? It is precisely this: if the list and the things that the man actually buys do not agree, and if this and this alone constitutes a mistake, then the mistake is not in the list but in the man's performance (if his wife were to say: “Look, it says butter and you have bought margarine”, he would hardly reply: “What a mistake! we must put that right” and alter the word on the list to “margarine”); whereas if the detective's record and what the man actually buys do not agree, then the mistake is in the record.[14]

In philosophy of mind

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According to Velleman, when used in the domain of the philosophy of mind, the concept direction of fit represents the distinguishing feature between two types of intentional mental states:

Facta (singular factum', states that currently exist) are states with a mind-to-world direction of fit.
Examples include beliefs, perceptions, hypotheses, and fantasies. In the event of a mismatch between the mental state and the world, the mental state is in some sense false or wrong and should perhaps be changed.
Facienda (singular faciendum, states that are yet to exist) are states with a world-to-mind direction of fit.
Examples include intentions and desires. If there is a mismatch between the mental state and the world, the world is, in some sense, wrong and should perhaps be changed.

In some forms of mind-body dualism, a matching factum and faciendum must be present in a person's mind in order for him to act intentionally. If a person has the belief that action (A) will lead to state (S), and has the desire that state (S) obtain, then he will perform action (A). The action is directly caused by simultaneous presence of the two mental states; no further explanation is needed.

According to Velleman:

The term "direction of fit" refers to the two ways in which attitudes can relate propositions to the world.
In cognitive attitudes [such as belief], a proposition is grasped as patterned after the world; whereas in conative attitudes [such as desire], the proposition is grasped as a pattern for the world to follow.
The propositional object of desire is regarded not as fact – not, that is, as factum, having been brought about – but rather as faciendum, to be brought about: it's regarded not as true but as to be made true.[15]

Ruth Millikan has also written influentially about representations, noting that many primitive representations used by animals are characterized by a dual direction of fit; she terms such representations "pushmi-pullyu representations."[16] As an example, she cites the role of bee dances in both informing other bees about the location of resources (indicative, or dance-to-world) and directing their action (imperative, or world-to-dance):

What then occurs in the head of a bee who understands a fellow bee's dance? Does the bee come to believe there is nectar at location L, desire to collect nectar, know that to collect nectar at L requires going to L, hence desire to go to L, hence, no other desires being stronger at the moment, decide to go to L, and proceed accordingly? Surely not. To posit anything more complicated than, as it were, a literal translation of the dance into bee mentalese is surely superfluous. The comprehending bee merely acquires an inner representation that is at the same time a picture, as it were, of the location of nectar (relative to its hive) and that guides the bee's direction of flight. The very same representation tells in one breath both what is the case and what to do about it. I call representations having this sort of double aspect "pushmi-pullyu" representations (or "PPRs") after Hugh Lofting's charming two-headed Janus-faced creature by that name.[17]

Millikan suggests that many perceptual representations (including those in humans) have such a dual function, both providing an agent information about the state of affairs in the world and suggesting action possibilities to change that state of affairs. She further remarked on the similarity between such representations and the role of affordances in the ecological perception theory of psychologist J. J. Gibson.[18]

However, Millikan's openness to Gibson's framework has not been typical of philosophers of mind, and later philosophers such as Bence Nanay have explored the possibility of action-oriented perception without endorsing affordance theory.[19][20]

The predictive coding framework of neural representations developed by neuroscientist Karl Friston and philosopher Andy Clark has similarly been observed to be an attempt to construe representations with dual direction of fit, uniting predictions (mind-to-world) and actions (world-to-mind).[21]

See also

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References

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Bibliography

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Direction of fit

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Direction of fit is a in , primarily developed by John R. Searle, that distinguishes types of intentional s and speech acts according to their relational orientation toward the world: some, like beliefs and assertions, have a mind-to-world or word-to-world direction, whereby the mental state or linguistic representation must conform to existing conditions in for satisfaction; others, like desires, intentions, directives, and promises, have a world-to-mind or world-to-word direction, whereby reality is expected to conform to the mental state or words through action or commitment. Searle first elaborated the notion in the context of speech act theory, where it serves as one of the key dimensions—alongside illocutionary point and sincerity conditions—for classifying illocutionary acts into categories such as assertives, directives, commissives, expressives, and declarations. For assertives (e.g., stating "The cat is on the mat"), the direction is word-to-world, meaning the proposition succeeds if it accurately describes the world. Directives (e.g., "Close the door") and commissives (e.g., "I promise to help") exhibit world-to-word fit, as their success depends on the world changing to fulfill the propositional content. Expressives (e.g., "I apologize") presuppose an independent fit and thus have no direction of fit, while declarations (e.g., "I now pronounce you married") impose a double direction, simultaneously representing and constituting the state of affairs. This framework highlights how linguistic force determines the conditions of satisfaction for utterances, relying on contextual background assumptions. In the , Searle extended direction of fit to analyze , the "aboutness" of mental states, emphasizing that it governs their conditions of satisfaction. Beliefs and perceptual experiences possess mind-to-world fit, succeeding when the world matches their content (e.g., the belief "It is ing" is satisfied if rain actually occurs). Conversely, desires and intentions have world-to-mind fit, succeeding when actions adjust the world to align with the mental content (e.g., desiring rain motivates efforts to make it so, if possible). Some states, like pleasure or pain, lack a direction of fit entirely, as their satisfaction does not depend on representational conformity. This distinction underscores the normative aspect of , where fit determines whether a state is fulfilled, and has influenced discussions in , action theory, and .

Core Concept

Definition and Basic Distinction

Direction of fit refers to the normative relation between representations—such as intentional mental states or linguistic expressions—and the they concern, categorizing them based on the direction in which adjustment or conformity is expected to occur. In the mind-to-world direction of fit, characteristic of beliefs and assertions, the representation is adjusted to align with the facts of the world, aiming for accuracy or truth. Conversely, in the world-to-mind direction of fit, typical of desires and commands, the world is altered through action to conform to the representation, seeking fulfillment or satisfaction. This distinction captures a fundamental in how these states relate to , influencing their success conditions and rational evaluation. The basic distinction is vividly illustrated by contrasting everyday artifacts that embody these directions. A exemplifies the mind-to-world (or word-to-world) direction: it is successful or accurate only if its features correspond to the actual , and any mismatch indicates a flaw in the map itself, requiring revision to fit the world. By contrast, a embodies the world-to-mind (or world-to-word) direction: it guides purchases, succeeding when the acquired items match the list, with any discrepancy prompting changes in the world (e.g., buying the listed goods) rather than altering the list. These examples highlight how the direction determines whether error correction targets the representation or the circumstances it addresses. Normatively, representations with a mind-to-world direction of fit, like , succeed through truth or correspondence to the ; a is defective if false, as it fails to conform to , demanding revision for epistemic propriety. Representations with a -to-mind direction of fit, like desires, succeed through satisfaction, where the aligns with them via practical action; an unfulfilled desire is not inherently flawed but motivates efforts to reshape circumstances accordingly. This difference underscores distinct standards of correctness: truth for the former as a matter of fit from representation to , and satisfaction for the latter as fit from to representation. The term "direction of fit" gained prominence in 20th-century analytic philosophy, particularly through discussions of intentionality and speech acts, though its ideas trace back to correspondence theories of truth that posit alignment between thought and reality as the criterion for veracity.

Types of Direction of Fit

The direction of fit framework, as developed by John Searle, initially distinguishes between two primary types: word-to-world and world-to-word. In the word-to-world direction, characteristic of descriptive assertions or beliefs, the representation (words or mental state) aims to conform to the facts of the world; success occurs when the representation accurately matches reality, as in the statement "The cat is on the mat," where the words fit the world if the cat is indeed there. Searle illustrates this with an arrow pointing from words to world, emphasizing that the burden of adjustment lies with the representation. Conversely, the world-to-word direction applies to prescriptive cases like commands, promises, or desires, where the world is expected to conform to the representation; fulfillment depends on the world changing to match, as in the command "Close the door," succeeding if the door is closed in response. Here, the arrow points from world to words, shifting the adjustment to external conditions. Beyond this binary, Searle expands the typology to include hybrid and null directions, accommodating more complex linguistic and mental phenomena. The double direction of fit, or bidirectional fit, occurs in declarations that simultaneously describe and effect a change in the world, represented by arrows in both directions. For instance, the "I now pronounce you married" both asserts a condition (word-to-world) and brings it into through institutional (world-to-word), succeeding only if the words accurately reflect and thereby alter . This dual adjustment is essential for performative acts that constitute social facts. A null or empty direction of fit applies to cases like expressives or questions, where no conformity between representation and world is required for success. In expressives, such as "I apologize for the delay," the utterance presupposes the truth of its propositional content and merely expresses a psychological state, with felicity depending on sincerity rather than fit. Similarly, questions like "Is it raining?" succeed by being appropriate in context, without aiming to match or change the world, and are depicted without any arrow in Searle's diagram. These variants highlight how direction of fit extends beyond simple binaries to capture the nuanced success conditions of intentional states and speech acts.

Historical Origins

Medieval Philosophy

In medieval philosophy, the concept of direction of fit finds its proto-form in Thomas Aquinas's theory of truth, articulated primarily in the Summa Theologica. Aquinas defines truth as the adaequatio rei et intellectus, or correspondence between thing and intellect, where the intellect either conforms to reality or serves as the standard by which reality is shaped. This framework emerges in Part I, Question 16, Article 1, where truth resides primarily in the intellect as the conformity of thought to thing, but extends secondarily to things themselves in their relation to the intellect. In Question 21, Article 2, Aquinas further links this to divine justice, portraying God's wisdom as the that governs creation's alignment with truth. Aquinas delineates two reciprocal directions of this correspondence, distinguishing between cases where the intellect measures the world and where the world measures the intellect. In the world-to-mind direction, created things conform to the divine , which acts as their measure and cause; for instance, an artifact is true insofar as it matches the blueprint in the artisan's mind, just as all beings reflect the eternal ideas in God's . Conversely, in the mind-to-world direction, the human is measured by eternal truths and conforms to through speculative , as when the mind apprehends the of a thing accurately. These directions highlight truth's dual : ontological truth in things (their fitting to divine measure) and in the (its fitting to things). This distinction is rooted in Aquinas's synthesis of Aristotelian realism, which emphasizes the intellect's abstraction from sensible things to grasp universal truths, and Augustinian illumination, where enables the mind's conformity to unchanging verities. Aristotle's influence appears in the practical intellect's role as a measure for action and production, while Augustine's legacy informs the speculative intellect's dependence on divine exemplars for certain knowledge. Aquinas integrates these by positing the divine intellect as the ultimate standard, resolving tensions between empirical realism and theological transcendence. Aquinas's framework prefigures modern distinctions between mind-to-world and world-to-mind fits in , though it remains theologically oriented with as the primordial measure of all truth. This medieval articulation underscores truth not merely as static correspondence but as dynamic relation, influencing subsequent scholastic discussions on and creation.

Early Modern and 20th Century Developments

In , laid foundational distinctions that prefigure the concept of direction of fit by differentiating ideas of substances from ideas of modes in his . Ideas of substances are intended to conform to external archetypes in the world, exhibiting a mind-to-world direction of fit where the mind adjusts its representations to match objective reality. In contrast, ideas of modes—such as those representing abstract relations or combinations like or —are mind-dependent creations without external archetypes, thus having a world-to-mind direction of fit where the world is expected to conform to these conceptual inventions. This framework highlights Locke's emphasis on representation as adaptive to objects for substances, while modes serve as tools for human categorization. David Hume further developed these ideas in A Treatise of Human Nature, distinguishing beliefs from passions in terms that align with opposing directions of fit. Beliefs function as representations that aim at truth by conforming to the facts of the world (mind-to-world direction), serving cognitive purposes through their association with impressions and ideas. Passions, however, including desires, are "original existences" that do not represent or aim at truth; instead, they motivate action by projecting the mind's state onto the world (world-to-mind direction), with reason merely instrumental in directing passions toward their ends. Hume's account underscores that desires lack the representational of beliefs, focusing instead on their role in driving behavior without evaluative conformity to reality. The explicit formulation of direction of fit emerged in mid-20th-century with J.L. Austin's 1953 lecture "How to Talk: Some Simple Ways," where he introduced the term to analyze how utterances relate to the world in performative contexts. Austin contrasted "cap-fitting" (word-to-world, where descriptions adapt to facts) with other relations, arguing that linguistic expressions carry an inherent direction that determines success conditions, such as conformity or imposition. Building on this, G.E.M. Anscombe's (1957) popularized the distinction through the shopping list metaphor: a (desire-like) succeeds if the world (purchases) fits it (world-to-mind), whereas an inventory list (belief-like) succeeds if it fits the world (mind-to-world). This clarified the practical implications for intentional action versus description. In the 1960s and 1970s, transitioned toward formal semantics and theory, with John Searle's Speech Acts (1969) systematizing Austin's insights by classifying illocutionary forces according to their directions of fit—word-to-world for assertives, world-to-word for directives and commissives, and bidirectional for declaratives. This period marked a shift from Austin's informal analysis to more structured frameworks, incorporating logical and semantic rigor while bridging linguistic phenomena to broader . Searle's work in Expression and Meaning (1979) further refined these categories, emphasizing how directions of fit underpin the psychological reality of speech, setting the stage for extensions into .

Applications in Philosophy of Language

Speech Acts Theory

In speech act theory, introduced a foundational distinction between constative and performative utterances, which prefigures the concept of direction of fit by differentiating between language that describes the world and language that acts upon it to alter reality. Constative utterances, such as factual statements, aim to represent existing states of affairs and succeed if they accurately match the world (word-to-world direction), evaluated by truth or falsity. In contrast, performative utterances perform actions through their issuance, such as promising or ordering, and succeed not by corresponding to prior facts but by effecting changes in the world to align with the words spoken (world-to-word direction). This binary framework, developed in Austin's lectures, challenges the traditional view of language as merely descriptive, highlighting its performative potential. Central to Austin's analysis is the notion of illocutionary force, which determines the success conditions of an utterance based on its direction of fit. For performative illocutionary acts, success hinges on whether the world is modified in accordance with the utterance's intent, rather than verifying an existing match. For instance, the act of promising succeeds if it creates a commitment that the speaker intends to fulfill, thereby changing social or personal obligations in the world, independent of any pre-existing truth about those obligations. This force is conveyed through the utterance's conventional meaning and , underscoring that performatives "do" something by invoking shared rules and expectations, not by asserting propositions. Austin further elaborated on felicitous conditions, the procedural rules that ensure a performative's validity and tie directly to its world-to-word direction of fit. These include the of accepted conventions for the act, the speaker's appropriate or position, and the correctness of the circumstances, such as and completeness of the procedure. Violations lead to "misfires," where the act fails to take effect—for example, an unauthorized person cannot felicitously order a maneuver, as the world does not change to match the utterance due to lacking procedural legitimacy. Thus, the direction of fit integrates with these conditions to define not just what the utterance attempts but what renders it effective in transforming reality. To illustrate, consider the utterance "Pass the salt," a directive performative with world-to-word fit: it succeeds illocutionarily if the addressee passes the salt, thereby altering the physical situation to match the request, provided felicitous conditions like contextual are met. By comparison, "The salt is on the table" is constative with word-to-world fit, succeeding only if the description accurately reflects the current state, verifiable as true without requiring worldly change. These examples highlight how Austin's framework applies direction of fit to delineate the pragmatic success of linguistic actions.

Searle's Classification

John Searle developed a systematic classification of illocutionary acts within speech act theory, incorporating direction of fit as a central feature to distinguish the conditions under which utterances succeed. In his 1979 taxonomy, Searle outlined five basic categories of illocutionary acts—assertives, directives, commissives, expressives, and declaratives—each defined by a unique illocutionary point that determines the direction of fit between the propositional content and the world. This framework was further formalized in collaboration with Daniel Vanderveken in their 1985 work, Foundations of Illocutionary Logic, where they explicitly identified four directions of fit: word-to-world (for assertives), world-to-word (for directives and commissives), double (for declaratives), and null (for expressives). The illocutionary point serves as the primary condition of satisfaction, specifying how the utterance relates to reality for the act to be felicitous. For assertives, the direction of fit is word-to-world, meaning the words must conform to the existing state of the world; the illocutionary point commits the speaker to the truth of the , with success depending on its actual truth and requiring the speaker's belief in it. Examples include statements like "The door is open," where the act succeeds if the accurately represents reality. Directives and commissives share a world-to-word direction of fit, where the world must change to match the words; directives aim to get the hearer to act (: desire), succeeding if the hearer complies, as in "Please close the door," while commissives bind the speaker to future action (: intention), succeeding upon fulfillment, as in "I promise to help." Declaratives feature a double direction of fit, where the simultaneously represents and brings about a new state of affairs, often within institutional contexts; the illocutionary point is to create the fact described, with success tied to the realization of that state and typically no specific sincerity condition beyond the speaker's . A representative example is "I declare ," which imposes the new reality by declaring it. Expressives have a null direction of fit, presupposing the truth of the without imposing any matching requirement; the illocutionary point is to express a psychological state (: that state, such as ), succeeding if the attitude is appropriately vented, as in "Ouch!" which conveys pain without propositional adjustment. Searle and Vanderveken integrated direction of fit with conditions—reflecting the speaker's psychological commitment—and degree of strength, which modulates the force of the illocutionary point without altering the fit itself; for instance, a "command" (high strength) and a "request" (low strength) both have world-to-word fit for directives but differ in commitment intensity. This thus provides a rigorous structure for analyzing how illocutionary acts achieve their effects through varying relations to the world.

Applications in Philosophy of Mind

Beliefs and Desires

In philosophy of mind, the direction of fit framework distinguishes between cognitive states like beliefs, which exhibit a mind-to-world direction, and conative states like desires, which exhibit a world-to-mind direction. Philosopher J. David Velleman articulates this through the concepts of facta and facienda. Beliefs treat propositions as facta—states of affairs that are taken to obtain in the world, aiming to align the mind with existing ; if a mismatch occurs, the belief is revised to conform to the world. In contrast, desires treat propositions as facienda—states to be brought about—prompting efforts to alter the world to match the mental state, rather than changing the desire itself. This distinction underpins the normative teleology of propositional attitudes. Beliefs are governed by epistemic , where their success condition is truth: a belief "ought" to fit the , making falsehood a failure of rational alignment. Desires, however, fall under practical rationality, where their success condition is realization: a desire "ought" to motivate changes in the to achieve fulfillment, rendering unfulfilled desires a prompt for action rather than revision. This normative asymmetry highlights how cognitive states prioritize accuracy and conative states prioritize efficacy in guiding behavior. A representative example illustrates this contrast. Consider the belief that "it is raining": its success depends on correspondence to the actual , succeeding if falls and failing if it does not, potentially leading to upon checking. By contrast, the desire that "it rains" succeeds through causation, motivating actions like or waiting for natural occurrence to make the world match the desire, without necessitating a change in the desire if fails to arrive. The direction of fit serves as a key feature of , the "aboutness" that characterizes mental content. It distinguishes representational states, such as beliefs, which represent the world and thus bear intentional content through mind-to-world fitting, from non-representational or action-oriented states like desires, which impose content on the world via world-to-mind fitting. This framework, as developed by , underscores how intentional mental states derive their directedness from satisfaction conditions tied to fit, marking them as uniquely mental phenomena.

Dual Representations

In , dual representations, also known as "pushmi-pullyu" representations after the fictional creature from Hugh Lofting's series, refer to mental or signaling states that simultaneously possess both mind-to-world and world-to-mind directions of fit. Philosopher Ruth Garrett Millikan introduced this to describe signs or representations that function descriptively—tracking or indicating features of the world—while also serving directively, motivating or guiding to alter the world accordingly. A classic biological example is the performed by honeybees, which communicates the location and quality of a source (mind-to-world fit, as it accurately represents environmental conditions) and simultaneously directs other bees toward that location (world-to-mind fit, as it prompts action to seek the resource). This dual functionality arises from the evolutionary selection of such signals to both inform and influence receivers, enabling coordinated in social species. Action-oriented perception extends this idea into perceptual processes, where sensory representations guide in ways that blend representational accuracy with practical direction. Philosopher Bence Nanay argues that often attribute "action-properties" to objects, such as seeing a as catchable or a surface as climbable, thereby representing the environment in a manner that directs the perceiver's actions to align with environmental affordances. In this framework, such exhibit a mind-to-world direction of fit, representing the environment's affordances, which motivate the agent to adjust their to fit those possibilities, integrating description with practical guidance. This view challenges traditional separations between and action, positing that perceptual states are inherently pragmatic, evolved to facilitate goal-directed responses in dynamic environments. Biological signaling provides further instances of dual representations, particularly in where signals both track real-world states and elicit behavioral changes. For example, alarm calls in vervet monkeys serve a descriptive function by indicating the presence and type of predator (e.g., or eagle, mind-to-world fit) while directing group members to adopt appropriate escape behaviors, such as climbing trees or seeking cover (world-to-mind fit). Similarly, Millikan describes the maternal call of hens, which signals the location of discovered to (descriptive) and urges them to approach and feed (directive), illustrating how such hybrid signals enhance through combined and . These examples highlight the prevalence of bidirectional fit in non-human intentional systems, where representations must balance fidelity to the world with efficacy in driving adaptive actions. Philosophically, dual representations undermine the strict binary distinction between indicative and imperative mental states, suggesting instead a continuum of in biological and cognitive systems. Millikan's implies that many natural signs, especially in social or perceptual contexts, operate on this , allowing for more nuanced accounts of how organisms represent and interact with their environments without requiring purely cognitive or conative categories. This perspective enriches the direction-of-fit framework by accommodating hybrid cases that integrate and direction, fostering a teleosemantic understanding of representation grounded in evolutionary function.

Contemporary Debates

Criticisms of the Framework

One prominent critique of the direction of fit framework argues that it fails to identify a unified determinable property that distinguishes mind-to-world and world-to-mind attitudes, rendering the distinction incoherent. Kim Frost contends that the standard opposition between these directions relies on a flawed mind-world dichotomy, where neither direction truly treats the external world as the object of a telic norm in a symmetrical manner. Furthermore, Frost highlights the metaphorical nature of terms like "fit" and "aim," noting that they do not literally apply to mental states; for instance, beliefs do not "aim" at truth in the causal or teleological sense of an arrow targeting a mark, but rather persist or adjust based on evidence without such directional failure. This leads Frost to conclude that the framework, while elegant, is ultimately empty as an explanatory tool for intentionality. The framework has also been criticized for over-simplifying the landscape of states by assuming a strict binary that neglects hybrid or complex cases. For emotions, such as , the representational component aligns with a mind-to-world direction by tracking potential dangers, yet the accompanying motivational —urging avoidance—suggests a world-to-mind pull, defying clean categorization within the traditional . Similarly, in collective intentionality, group beliefs are expected to exhibit mind-to-world fit, but scenarios involving mismatched individual commitments can result in collective attitudes where the direction varies or conflicts across members, undermining the framework's applicability to social phenomena. A related objection concerns the framework's entanglement with , presuming that directions of fit inherently imply "oughts" for attitudes—beliefs ought to conform to the world, desires ought to shape it—yet this blurs when applied to non-normative representations like reflexes or illusions. For example, perceptual reflexes represent environmental features without normative pressure to align or adjust, challenging the assumption that all intentional-like states carry directional norms. Critics argue that such cases reveal the framework's inability to delineate normative from descriptive aspects of mentality without additional, unstated commitments.

Extensions and Alternatives

In predictive processing frameworks, the direction of fit concept has been integrated with active inference models developed by Karl Friston and elaborated by Andy Clark, where perceptual processes exhibit a mind-to-world direction by minimizing prediction errors through updating internal models to align with sensory inputs, while actions demonstrate a world-to-mind direction by selecting behaviors that resolve discrepancies and update priors to better anticipate environmental states. Recent work as of 2024 has further extended this to desire and , treating desires as conative states with world-to-mind fit within predictive models that balance hierarchical inference and active engagement. This unification under free-energy minimization treats both directions as complementary mechanisms for reducing surprise, allowing the brain to function as a hierarchical inference engine that balances passive with active intervention in the world. James J. Gibson's offers an alternative to the traditional direction of fit by conceptualizing affordances as relational properties emerging from the mutual fit between organism and environment, rendering perception-action coupling inherently bidirectional without relying on the representational metaphor of unidirectional fit. In this view, affordances—such as a chair's support for sitting—are not mental states fitting or being fitted by the world but objective possibilities for action directly specified by ambient optical arrays, emphasizing organism-environment reciprocity over belief-desire asymmetries. Beyond classical applications, direction of fit has been extended to , where certain affective states exhibit mixed directions, combining mind-to-world representational accuracy (e.g., tracking genuine threats) with world-to-mind motivational impulses (e.g., prompting avoidance behaviors), as explored in analyses of emotional fittingness. In motivational cognitivism, the framework informs debates on desire-as-belief theories, where cognitivists argue that desires can be reduced to belief-like states with mind-to-world fit, challenging Humean by showing how motivational force arises from cognitive alignment rather than a distinct conative direction. As an alternative to the binary mind-to-world and world-to-mind schema, I. Lloyd Humberstone proposed "thetic" and "telic" fits to more precisely capture attitude types, with thetic attitudes (e.g., judgments) succeeding when the attitude fits the world, and telic attitudes (e.g., intentions) succeeding when the world fits the attitude, providing a non-metaphorical inferential applicable to diverse propositional attitudes. In social , extensions to group-level phenomena involve , where shared commitments—such as institutional declarations—impose double directions of fit, with mind-to-world elements in representing social facts and world-to-mind elements in normatively guiding group actions; recent discussions as of emphasize how content matters in determining fit for collective states.

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