191.18/50.29 MAYBE 191.18/50.29 191.18/50.29 Problem: 191.18/50.29 0(0(0(0(x1)))) -> 1(0(1(1(x1)))) 191.18/50.29 1(0(0(1(x1)))) -> 0(0(0(0(x1)))) 191.18/50.29 191.18/50.29 Proof: 191.18/50.29 Open 191.18/50.30 EOF