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4 cards from this section. Quick, good the night before a test.
What is a tautology? Provide an example.
Think of a statement that can't be false.
What happens when you negate 'p and q'?
Consider how negation distributes.
What is the statement 'p or not p' classified as?
It cannot be false under any condition.
True or False: The contrapositive of 'If p then q' is 'If q then p'.
Remember the definitions clearly.
Prove that the expressions 'not (p and q)' and 'not p or not q' are equivalent using truth tables.
Make sure to list all combinations for p and q.
Using logical identities, simplify the expression 'not (p or (q and r))' step-by-step.
Work through transformation phases slowly.
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