Hello Cafe, I have data CmpFunction a = CF (a -> a -> Bool) that contains comparing functions, like ==, <, > ..., and I'm trying to declare the Show instance for it like this instance Show (CmpFunction a) where show (CF (==)) = "== " -- no good show f = case f of -- no good also CBF (==) -> "==" _ -> "Other" but compiler complains for both with This binding for `==' shadows the existing binding imported from `Prelude' at src/Main.hs:6:8-11 (and originally defined in `ghc-prim:GHC.Classes') Is it possible at all to compare two functions or how to solve this problem, to show some string for a specific function? br, vlatko