2.05/1.36	NO
2.05/1.36	
2.05/1.36	Proof:
2.05/1.36	This system is not confluent.
2.05/1.36	For the unconditional CP tp2(z, x') = tp2(0, add(z, x')) the left- and right-hand sides are two different normal forms wrt R_u.
2.05/1.36	
2.25/1.41	EOF