MAYBE 36.53/10.91 MAYBE 36.53/10.91 36.53/10.91 Problem: 36.53/10.91 not(not(x)) -> x 36.53/10.91 not(or(x,y)) -> and(not(not(not(x))),not(not(not(y)))) 36.53/10.91 not(and(x,y)) -> or(not(not(not(x))),not(not(not(y)))) 36.53/10.91 36.53/10.91 Proof: 36.53/10.91 Open 36.53/10.91 EOF