(ignored inputs)COMMENT Exercise 6.5{c} of \cite{BN98}
Rewrite Rules:
   [ f(?x,?x) -> a,
     f(?x,g(?x)) -> b ]
Apply Direct Methods...
Inner CPs:
   [  ]
Outer CPs:
   [  ]
Overlay, check Innermost Termination...
Innermost Terminating (hence Terminating), WCR
Knuth&Bendix
Direct Methods: CR

Final result: CR
/local-scratch/hzankl/2012/cops2012/12.trs: Success(CR)
(1 msec.)