YES ---- CR(R) ---- Rule Labeling [van Oostrom, RTA 2008]. R: H(I(x)) -> K(J(x)) J(x) -> K(J(x)) I(x) -> I(J(x)) J(x) -> J(K(J(x))) Label: [H(I(x)) -> K(J(x))] = 0 [J(x) -> K(J(x))] = 0 [I(x) -> I(J(x))] = 1 [J(x) -> J(K(J(x)))] = 1