On Jul 13, 3:22 pm, Eukie_M_SHIRAISHI <ms.eu...@gmail.com> wrote:
> 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
> 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.

Pffft. Speaking of quizzes, what is "_M_" in kanji? And what are the
characters for Yukie?