Comment #6 on issue 2696 by asmeurer: Assumptions fail for non-commutative symbols
http://code.google.com/p/sympy/issues/detail?id=2696
Ah, I see. noncommutative implies not complex. So this is correct. Should this be closed then?
By the way, I seem to remember discussing this before, but is it a good idea to make irrational imply real? This way, irrational != not rational, which is somewhat confusing. I suppose it might seem strange to say that a number like I is irrational, but I think it technically fits with the definition (cannot be written as the quotient of integers).
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