Comment #6 on issue 2626 by asmeurer: Piecewise should use a different syntax for "otherwise"
http://code.google.com/p/sympy/issues/detail?id=2626
I don't think so. We shouldn't confuse Tuples with Vectors. Tuple was invented only for making args Basic.
I think I agree. We should only ever have Exprs inside of expressions (like as args of an Add or a Mul for example). Right now, this isn't enforced, but perhaps it should be.
By the way, this is not exactly confusing with Vectors. It's just saying, I want this Tuple if this condition holds, and this Tuple if this other condition holds, and do on.
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