Suppose p is a Boolean variable. Prove that pp.

Problem 12. Suppose p is a Boolean variable. Prove that p 1p 1. Hint. Give a Hilbert-style proof and use the axiom of golden rule followed by equa- nimity. Problem 12. Suppose p is a Boolean variable. Prove that p 1p 1. Hint. Give a Hilbert-style proof and use the axiom of golden rule followed by equa- nimity