If p is any statement , then prove that
` ~ ( ~ p) -= p`

If p is any statement then (p vee ~p) is a

If p is any logical statement, then

If p is any logical statement, then

For any statement 'p' prove that ~(~p)-= p.

If p and q are two statements , prove that ~( p vee q) -= (~p) ^^ ( ~q )

If p and q and q are two statements , prove that (i) ~( p vee q) -= (~p) ^^ ( q) " " (ii) ~( p ^^ q) = (~p) v(~q)

If p and q are two given statements the prove that , ~(p^^q)-=(~p)vv(~q)

If p and q are two given statements the prove that , ~(prArrq)-=(p)^^(~q)