1.23/0.81	NO
1.23/0.81	
1.23/0.81	Proof:
1.23/0.81	This system is not confluent.
1.23/0.81	For the unconditional CP tp2(0, add(z, x')) = tp2(z, x') the left- and right-hand sides are two different normal forms wrt R_u.
1.23/0.81	
1.23/0.83	EOF