[Haskell-cafe] Why do I have to specify (Monad m) here again?

Why do I have to specify (Monad m) here again? class (Monad m) => GetMV m a where ... instance GetMV m c where ... No instance for (Monad m) arising from the superclasses of an instance declaration possible fix: add (Monad m) to the instance declaration superclass context Marc