Updates: Blockedon: 2196 Comment #3 on issue 2486 by asmeurer: S.Zero.is_finite == False http://code.google.com/p/sympy/issues/detail?id=2486
This suffers from the same problem as issue 2294 and also issue 2164, which is issue 2196 ("Document assumptions"). Unless we very clearly write down what each of the assumptions mean, it's hard to tell what's a bug and what's just a misunderstanding of what the assumption is.
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