Denialism

In the sciences and in historiography, denialism is the rejection of basic facts and concepts that are undisputed, well-supported parts of the scientific consensus or historical record on a subject, in favor of ideas that are radical, controversial, or fabricated. Examples include Holocaust denial, AIDS denialism, and climate change denial. The forms of denialism present the common feature of the person rejecting overwhelming evidence and trying to generate political controversy in attempts to deny the existence of consensus.

In psychology, denialism is a person's choice to deny reality as a way to avoid believing in an uncomfortable truth. Denialism is an essentially irrational human behavior that withholds the validation of a historical experience or event when a person refuses to accept an empirically verifiable reality.

The motivations and causes of denialism include religion, self-interest (economic, political, or financial), and defence mechanisms meant to protect the psyche of the denialist against mentally disturbing facts and ideas; such disturbance is called cognitive dissonance.

Anthropologist Didier Fassin distinguishes between denial, defined as "the empirical observation that reality and truth are being denied", and denialism, which he defines as "an ideological position whereby one systematically reacts by refusing reality and truth". Persons and social groups who reject propositions on which there exists a mainstream and scientific consensus engage in denialism when they use rhetorical tactics to give the appearance of argument and legitimate debate, when there is none. It is a process that operates by employing one or more of the following five tactics to maintain the appearance of legitimate controversy:

Common tactics to different types of denialism include misrepresenting evidence, false equivalence, half-truths, and outright fabrication. South African judge Edwin Cameron notes that a common tactic used by denialists is to "make great play of the inescapable indeterminacy of figures and statistics". Historian Taner Akçam states that denialism is commonly believed to be negation of facts, but in fact "it is in that nebulous territory between facts and truth where such denialism germinates. Denialism marshals its own facts and it has its own truth."

Focusing on the rhetorical tactics through which denialism is achieved in language, in Alex Gillespie (2020) of the London School of Economics has reviewed the linguistic and practical defensive tactics for denying disruptive information. These tactics are conceptualized in terms of three layers of defence:

In 2009, author Michael Specter defined group denialism as "when an entire segment of society, often struggling with the trauma of change, turns away from reality in favor of a more comfortable lie".

If one party to a debate accuses the other of denialism they are framing the debate. This is because an accusation of denialism is both prescriptive and polemic: prescriptive because it carries implications that there is truth to the denied claim; polemic since the accuser implies that continued denial in the light of presented evidence raises questions about the other's motives. Edward Skidelsky, a lecturer in philosophy at Exeter University writes that "An accusation of 'denial' is serious, suggesting either deliberate dishonesty or self-deception. The thing being denied is, by implication, so obviously true that the denier must be driven by perversity, malice or wilful blindness." He suggests that, by the introduction of the word denier into further areas of historical and scientific debate, "One of the great achievements of The Enlightenment – the liberation of historical and scientific enquiry from dogma – is quietly being reversed".