1.91/1.27	NO
1.91/1.27	
1.91/1.27	Proof:
1.91/1.28	This system is not confluent.
1.91/1.28	For the unconditional CP c = d the left- and right-hand sides are two different normal forms wrt R_u.
1.91/1.28	
1.91/1.30	EOF