MAYBE MAYBE TRS: { f(0(), 1(), g(x, y), z) -> f(g(x, y), g(x, y), g(x, y), h(x)), g(0(), 1()) -> 0(), g(0(), 1()) -> 1(), h(g(x, y)) -> h(x) } DUP: We consider a duplicating system. Trs: { f(0(), 1(), g(x, y), z) -> f(g(x, y), g(x, y), g(x, y), h(x)), g(0(), 1()) -> 0(), g(0(), 1()) -> 1(), h(g(x, y)) -> h(x) } Fail