1.92/1.68 NO 1.92/1.68 1.92/1.68 Proof: 1.92/1.69 This system is not confluent. 1.92/1.69 For the unconditional CP g(b) = h(b) ctcap(g(b)) and ctcap(h(b)) wrt R_u are not unifiable. 1.92/1.69 1.92/1.71 EOF