YES ---- CR(R) ---- R : linear and strongly closed [Huet, 1980] R: f(x) -> g(x) f(x) -> h(f(x)) h(f(x)) -> h(g(x)) g(x) -> h(g(x)) CP(R): g(___y3) -> h(f(___y3)) h(g(___y5)) -> h(g(___y5)) h(f(___y9)) -> g(___y9) h(h(f(___y13))) -> h(g(___y13))