Re: [Haskell-cafe] the problem of design by negation

Design-by-negativity can *be* a way of being creative. I've lost count of the number of times that I've been explaining to someone why something can't be done, and suddenly realised that one of the reasons was invalid and seen how to do it. The key is not whether you explore the design space from a positive end or from a negative end, but whether you *explore* it.