MAYBE MAYBE TRS: { 0(0(x)) -> 0(x), 0(1(x)) -> 1(x), 1(0(x)) -> 0(0(0(1(x)))), 1(1(x)) -> 0(0(0(0(x)))) } DUP: We consider a non-duplicating system. Trs: { 0(0(x)) -> 0(x), 0(1(x)) -> 1(x), 1(0(x)) -> 0(0(0(1(x)))), 1(1(x)) -> 0(0(0(0(x)))) } Fail