MAYBE
(ignored inputs)COMMENT [111] p. 29 ( GUNC & ~UNC & ~GNFP )
Rewrite Rules:
   [ a -> a,
     f(b,?x) -> b,
     f(?x,a) -> a ]
Apply Direct Methods...
Inner CPs:
   [ f(?x_1,a) = a ]
Outer CPs:
   [ b = a ]
Linear
(inner) Parallel CPs: (not computed)
unknown Toyama (Parallel CPs)
Direct Methods: Can't judge

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