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Inverse View
It is not the case that Deriving a known truth from a hypothesis via a valid argument establishes only consistency, not plausibility — affirming the consequent is a logical fallacy.
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Reasons For
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Reason for
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1.
Successful prediction of known truths via H provides stronger evidential support than bare logical validity requires.
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2.
Abductive inference legitimately infers best explanations without deductive validity; deriving known truths is explanatory power.
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3.
The claim conflates formal logic (validity) with evidential reasoning (confirmation); plausibility in science relies on the latter.
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Reasons Against
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Reason against
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1.
If H implies K, and K is true, multiple hypotheses could entail K, so H's truth remains underdetermined logically.
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2.
Affirming the consequent commits a formal logical error: (H→K, K) does not validly conclude H in classical logic.
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3.
Consistency merely means absence of contradiction, while plausibility requires comparative evidence favoring H over alternatives.
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