Updates:
        Labels: -NeedsBetterPatch NeedsReview

Comment #12 on issue 1772 by smichr: Integral(1,x).is_number fails
http://code.google.com/p/sympy/issues/detail?id=1772

No, that's not the right thing to do because Integral(x,x) can't be decided then. So it's possible to get False when there is an unsimplified zero for an integrand. (See issue 1999 for the fix to the expample you raised).

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