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Denying the Antecedent - a fallacy

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Denying the Antecedent - a fallacy - 2007/01/14 02:30 Stupid fuckwitted pig-headed Dreck:

1) if x, then y 2) not x therefore 3) not y

That is a ***valid*** form of propositional logic because it is presented in a ***valid*** form, [...], [emphasis added]

Kenneth S. Pope, Ph.D.:

Denying the Antecedent

This ***fallacy*** takes the form of:
If x, then y.
Not x.
therefore: not y.

http://kspope.com/fallacies/fallacies.php [emphasis added]

Dreck says it is a valid form; Kenneth Pope, Ph.D., says it is invalid (a fallacy). Whom do you believe?



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