Comment #7 on issue 1879 by ronan.l...@gmail.com: Satisfiable theory
resulting in False
http://code.google.com/p/sympy/issues/detail?id=1879
Well spotted! However, I'm not sure your change to dpll is useful: the real
problem
seems to be a bug in unit_propagate where clauses consisting solely of the
literal
for which unit propagation occurs are not deleted from the output.
I happened to fix this in my branch for issue 1545, but I didn't realise it
made any
difference. The test passes there.
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