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A false dilemma (also called false dichotomy, false binary, black-and-white thinking, bifurcation, denying a conjunct, the either–or fallacy, fallacy of exhaustive hypotheses, the fallacy of false choice, the fallacy of the false alternative, or the fallacy of the excluded middle) is a type of informal fallacy that involves a situation in which only limited alternatives are considered, when in fact there is at least one additional option. The opposite of this fallacy is argument to moderation. The options may be a position that is between two extremes (such as when there are shades of grey) or may be completely different alternatives. Phrasing that implies two options (dilemma, dichotomy, black-and-white) may be replaced with other number-based nouns, such as a "false trilemma" if something is reduced to only three options. False dilemma can arise intentionally, when fallacy is used in an attempt to force a choice or outcome such as, in some contexts, the assertion that "if you are not with us, you are against us." The false dilemma fallacy also can arise simply by accidental omission of additional options rather than by deliberate deception. Additionally, it can be the result of habitual, patterned, black-and-white and/or intensely political/politicized thinking whereby a model of binary (or polar) opposites is assigned or imposed to whatever regarded object/context, almost automatically—a process that may ignore both complexity and alternatives to more extreme juxtaposed archetypes; binary opposition is explored extensively in critical theory. Some philosophers and scholars believe that "unless a distinction can be made rigorous and precise it isn't really a distinction".〔Jacques Derrida (1991) ''Afterword: Toward An Ethic of Discussion'', published in the English translation of ''Limited Inc.'', pp.123-4, 126〕 An exception is analytic philosopher John Searle, who called it an incorrect assumption that produces false dichotomies.〔Searle, John. (1983) ''The Word Turned Upside Down''. The New York Review of Books, Volume 30, Number 16, October 27, 1983.〕 Searle insists that "it is a condition of the adequacy of a precise theory of an indeterminate phenomenon that it should precisely characterize that phenomenon as indeterminate; and a distinction is no less a distinction for allowing for a family of related, marginal, diverging cases."〔 Similarly, when two options are presented, they often are, although not always, two extreme points on some spectrum of possibilities; this may lend credence to the larger argument by giving the impression that the options are mutually exclusive of each other, even though they need not be. Furthermore, the options in false dichotomies typically are presented as being collectively exhaustive, in which case the fallacy may be overcome, or at least weakened, by considering other possibilities, or perhaps by considering a whole spectrum of possibilities, as in fuzzy logic. ==Examples== 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「false dilemma」の詳細全文を読む スポンサード リンク
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