Re: [Haskell-beginners] Ignore in import

Duplicate instance declarations:

it appears that there is (or was?) no way to hide instance definitions: https://mail.haskell.org/pipermail/haskell-cafe/2009-July/063842.html however looking at the exercise: "... implement Functor instances for Either e, ((,) e), and ((->) e).” does this not suggest 1) instance Functor Either e, ((,) e) and 2) instance Functor Either e, ((->) e) ?