Illogical Arguments Flashcards

1
Q

denying the antecedent

A

If P, then Q.
Not P.
Therefore, not Q.

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2
Q

affirming the consequent

A

If P, then Q.
Q.
Therefore, P.

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3
Q

multiple denying the antecedent

A

If P, then Q.
If Q, then R.
Not P.
Therefore, not R.

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4
Q

multiple affirming the consequent

A

If P, then Q.
If Q, then R.
R.
Therefore, P.

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