1.92/1.29 NO 1.92/1.29 1.92/1.29 Proof: 1.92/1.29 This system is not confluent. 1.92/1.29 For the unconditional CP c = d ctcap(c) and ctcap(d) wrt R_u are not unifiable. 1.92/1.29 2.08/1.32 EOF