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Which of the following is always true?...

Which of the following is always true?

A

`(p rarr q) equiv ~ q rarr ~ p`

B

`~(p vv y) equiv ~ q vv ~ p`

C

`~(p rarr q) equiv p vv ~ q`

D

`~(p ^^ q) equiv ~ p ^^ ~ q`

Text Solution

Verified by Experts

The correct Answer is:
A
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