YES ---- CR(R) ---- R : left-linear, C : CR and CP-closing, and Cdup/R : SN R: F(G(x,A(),B())) -> x G(F(H(C(),D())),x,y) -> H(K1(x),K2(y)) K1(A()) -> C() K2(B()) -> D() CP(R): F(H(K1(A()),K2(B()))) -> F(H(C(),D())) critical-pair-closing system C: F(G(x,A(),B())) -> x K1(A()) -> C() K2(B()) -> D() CR(C): see below. ---- CR(R) ---- R : linear and strongly closed [Huet, 1980] R: F(G(x,A(),B())) -> x K1(A()) -> C() K2(B()) -> D() CP(R):