(ignored inputs)COMMENT doi:10.1016/0890-5401 ( 90 ) 90023-B [122] Example 2.2 submitted by: Takahito Aoto
Rewrite Rules:
   [ f(g(f(?x))) -> g(f(g(?x))),
     f(c) -> c,
     g(c) -> c ]
Apply Direct Methods...
Inner CPs:
   [ f(g(c)) = g(f(g(c))),
     f(g(g(f(g(?x))))) = g(f(g(g(f(?x))))) ]
Outer CPs:
   [  ]
not Overlay, check Termination...
Terminating, not WCR
Knuth & Bendix
Direct Methods: not CR

Combined result: not CR
567.trs: Success(not CR)
NO
(8 msec.)