(ignored inputs)COMMENT Exercise 6.4 of \cite{BN98} Rewrite Rules: [ f(g(f(?x))) -> g(?x) ] Apply Direct Methods... Inner CPs: [ f(g(g(?x))) = g(g(f(?x))) ] Outer CPs: [ ] not Overlay, check Termination... Terminating, not WCR Knuth&Bendix Direct Methods: not CR Final result: not CR /local-scratch/hzankl/2012/cops2012/9.trs: Success(not CR) (0 msec.)