Let P|Q mean "P and Q are both false." P|Q is true if P and Q are both false, and false otherwise. Define the following logical connectives just using P, Q, |, and parentheses.

1. ~P (not P)
2. P&Q (P and Q)
3. PVQ (P or Q)
4. P->Q (P implies Q)
5. P<->Q (P if and only if Q)

(In reply to Perplexing �� Quintuple answered by Dej Mar)

1, 2, and 3 are correct, but 4 and 5 are wrong.

Posted by Math Man on 2012-01-24 12:24:39