YES ---- CR(R) ---- R : left-linear, C : CR and CP-closing, and Cdup/R : SN R: F(H(x),y) -> F(H(x),I(I(y))) F(x,G(y)) -> F(I(x),G(y)) I(x) -> x CP(R): F(H(___y125),I(I(G(___y128)))) -> F(I(H(___y125)),G(___y128)) F(I(H(___y134)),G(___y133)) -> F(H(___y134),I(I(G(___y133)))) critical-pair-closing system C: I(x) -> x CR(C): see below. ---- CR(R) ---- R : left-linear, C : CR and CP-closing, and Cdup/R : SN R: I(x) -> x CP(R): critical-pair-closing system C: CR(C): see below. ---- CR(R) ---- R is empty.