A) tautology
B) contradiction
C) neither tautology nor contradiction
D) either tautology or contradiction
Correct Answer: C
Solution :
| p | q | \[\tilde{\ }p\vee q\] | \[\tilde{\ }p\hat{\ }\tilde{\ }q\] | \[(\tilde{\ }p\vee q)\,\hat{\ }(\tilde{\ }p\hat{\ }\tilde{\ }q)\] |
| T | T | T | F | F |
| T | F | F | F | F |
| F | T | T | F | F |
| F | F | T | T | T |
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