1.

What is Transposition rule?

A. From P ‚Üí Q, infer ~Q ‚Üí P
B. From P ‚Üí Q, infer Q ‚Üí ~P
C. From P ‚Üí Q, infer Q ‚Üí P
D. From P ‚Üí Q, infer ~Q ‚Üí ~P
Answer» E.


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