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Belief bias is the tendency to judge the strength of arguments based on the plausibility of their conclusion rather than how strongly they support that conclusion. == Syllogisms == (詳細はsyllogism'' is a kind of logical argument in which one proposition (the conclusion) is inferred from two or more others (the ''premises'') of a specific form. The classical example of a valid syllogism is: ::All humans are mortal. (major premise) ::Socrates is human. (minor premise) ::Therefore, Socrates is mortal. (conclusion) An example of an invalid syllogism is: :: All teenage girls are ambitious. :: Teenage girls study hard. :: Therefore, girls study hard because they are ambitious. Typically a majority of test subjects in studies incorrectly identify this syllogism as one in which the conclusion follows from the premises.〔 It might be true ''in the real world'' that a) ''girls study'' and b) ''this is because they are ambitious''. However, this argument is a fallacy, because the conclusion is not supported by its premises. The validity of an argument is different from the truth of its conclusion: there are valid arguments for false conclusions and invalid arguments for true conclusions. Hence it is an error to judge the validity of an argument from the plausibility of its conclusion. This is the reasoning error known as belief bias.〔 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「Belief bias」の詳細全文を読む スポンサード リンク
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