MAYBE
(ignored inputs)COMMENT submitted by: Akihisa Yamada used by COPS #1275
Rewrite Rules:
   [ f(g(?x)) -> g(f(f(?x))),
     f(h(?x)) -> h(h(f(?x))),
     f(?x) -> ?x,
     g(?x) -> ?x ]
Apply Direct Methods...
Inner CPs:
   [ f(?x_3) = g(f(f(?x_3))) ]
Outer CPs:
   [ g(f(f(?x))) = g(?x),
     h(h(f(?x_1))) = h(?x_1) ]
Linear
(inner) Parallel CPs: (not computed)
unknown Toyama (Parallel CPs)
Direct Methods: Can't judge

Combined result: Can't judge
1649.trs: Failure(unknown CR)
(0 msec.)