Prove A U B= B U A I know this seems really obvious but I can't figure out how to formally prove it. Thanks!
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The disjunctive or is commutative. A or B is the same as B or A is the same as .
I need to write up a proof of why that is true though
The reason it is true is that or, , is commutative. That is the entire proof.
Last edited by Plato; Sep 10th 2010 at 03:27 PM.
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