When it comes to boolean logic (truth tables, etc), "but" is "and". The only difference is one of emphasis/constrast (what theorbtwo was talking about). For example 
1)  I went to school and bob went to work.
2)  I went to school but bob went to work.

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The two statements are logically equivalent, but in #2 the writer wishes to emphasize the difference.

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In reply to Re: A "but" operator. by PodMaster
in thread A "but" operator. by muba

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