A) Tautology and contradiction
B) Neither tautology nor contradiction
C) Contradiction
D) Tautology
Correct Answer: C
Solution :
| p | ~p | pÞ~p | ~pÞ p | \[(p\Rightarrow \ \tilde{\ }p)\wedge (\tilde{\ }p\Rightarrow p)\] |
| T | F | F | T | F |
| F | T | T | F | F |
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