Something as simple as below:

import sympy as sp;
U1, red, green = sp.symbols("U1, red, green");
sp.ask(sp.Ne(U1,red), assumptions=sp.Eq(U1,green));

Returns None, but.

sp.ask(sp.Eq(U1,green), assumptions=sp.Eq(U1,green));

Returns True.

What I are doing wrong?

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