Thanks to all that replied (Derek & Ryan for the major understanding, Albert & Luke also)*. I guess I was getting confused with the error message:
> (All instance types must be of the form (T a1 ... an) I was interpreting this with Stringable/Enum as T and [Char]/Blah as a1. Now I have clarity! I shall have to follow up Iavor's lead on why this *is*. Thanks! *[Silly email reply system; discussions on the internet should form an acyclic directed graph, not a tree! This, incidentally, is why I'm replying to myself.]
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