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*use*what we prove to calculate something.

For example, my prof spent the first two lectures proving cross and dot product identities (the ones found on the inside covers of many math or physics books). Why? I don't know. The tests are open book and I already know the identities work because I've used them in other classes. Oh, right, and this is an E&M class, not a math class.

WHY do these people do this? If I cared about proofs so much, I'd be a math major. Yes, I'd

*like*to know why the hell we have Heisenberg's Uncertainty Principle, but the test (and I assume any career in the future that would use QM) would require us to

*use*it!

I mean, Jesus, when I was 16 and my dad explained to me why a car works, I didn't suddenly know how to drive it.

Not to mention, proofs are just puzzles. You are given the answer and just need to work up to it.

Is this just me? Am I just not cut out as a physicist or something? This is really bugging me.