MAYBE MAYBE TRS: { *(x, +(y, f(z))) -> *(g(x, z), +(y, y)), *(*(x, y), z) -> *(x, *(y, z)), *(+(x, y), z) -> +(*(x, z), *(y, z)) } DUP: We consider a duplicating system. Trs: { *(x, +(y, f(z))) -> *(g(x, z), +(y, y)), *(*(x, y), z) -> *(x, *(y, z)), *(+(x, y), z) -> +(*(x, z), *(y, z)) } Fail