MAYBE
(ignored inputs)COMMENT doi:10.1007/s10817-011-9238-x [33] Example 8
Rewrite Rules:
   [ f(a,a) -> c,
     f(b,?x) -> f(?x,?x),
     f(?x,b) -> f(?x,?x),
     a -> b ]
Apply Direct Methods...
Inner CPs:
   [ f(b,a) = c,
     f(a,b) = c ]
Outer CPs:
   [ f(b,b) = f(b,b) ]
Left-Linear, not Right-Linear
(inner) Parallel CPs: (not computed)
unknown Toyama (Parallel CPs)
Direct Methods: Can't judge

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