1.90/1.27	NO
1.90/1.27	
1.90/1.27	Proof:
1.90/1.27	This system is not confluent.
1.90/1.27	For the unconditional CP s(b) = t(b) the left- and right-hand sides are two different normal forms wrt R_u.
1.90/1.27	
2.06/1.31	EOF