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QUIZ with a Prize_10vii2008

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Eukie_M_SHIRAISHI

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Jul 9, 2008, 6:32:57 PM7/9/08
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Select the truths from the following 1) – 5)

1) If [ if P, then Q ], then there can be the case in which [ if not-P,
then not-Q ].

2) If [ if P, then Q or R ], then either [ if P, then Q ] or [ if P,
then R ].

3) If and only if [P and not-Q] is a contradiction, [ if P, then Q ]
holds true.

4) If and only if there is a case in which Q does not hold true despite
that P holds true, [ if P, then Q ] does not hold true.

5) If there is a case in which P does not hold true, then P is a
contradiction.

Eukie_M_SHIRAISHI

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Jul 10, 2008, 1:50:28 AM7/10/08
to

Select the truths from the following 1) – 5)

1) If [ if P, then Q ], then there can be the case in which [ if not-P,
then not-Q ].

2) If [ if P, then Q or R ], then either [ if P, then Q ] or [ if P,
then R ].

3) If and only if [P and not-Q] is a contradiction, [ if P, then Q ]
holds true.

4) If and only if there is a case in which Q does not hold true despite

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