affirmation of the consequent

Definition of affirmation of the consequent 

: the logical fallacy of inferring the truth of the antecedent of an implication from the truth of the consequent (as in, “if it rains, then the game is cancelled and the game has been cancelled, therefore it has rained”)

called also assertion of the consequent

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First Known Use of affirmation of the consequent

1854, in the meaning defined above

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The first known use of affirmation of the consequent was in 1854

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