2.5-2.8, due January 11

1. The most difficult section for me was on tautologies and contradictions. It's hard for me to wrap my mind around checking if a sentence is a tautology or a contradiction, because I want to just check if it is a true or false statement. For the statement, "2 is odd or 2 is even," I know that 2 is even, so it is hard for me to entertain a case where 2 is odd.

2. I really like how much we are using truth tables right now. Last year I took a computer science class, and we learned how to program in binary. It was pretty cool to see how much you can do with simple logic. What we are learning right now kind of reminds me of that class.