I need to find the truth value of an expression. Consider this:
sage: R = BooleanPolynomialRing( 2, \
['s%d'%(i) for i in range (2)])
sage: expr = R('s0') + R('s0')*R('s1')
Now I need expr is to be evaluated; given, say, both s0 and s1 are True. How can we do that?
