Section 7

1. The section where it wanted us to find out what statement the proof was proving was confusing, I had a hard time when there were two variables x and y, and understanding which variables corresponded to what.

2. The idea of contrapositive proofs made sense to me otherwise. In some cases it's much easier to assume that the conclusion is false and therefore the premise must be false, rather than trying to do a direct proof that the premise is true. It seems like this will be a useful tactic to remember when writing other proofs in the future.

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