On Wed, Nov 16, 2011 at 23:54, Magicloud Magiclouds < magicloud.magiclo...@gmail.com> wrote:
> I think this is where I did not understand from the very beginning. > If the the declaration was correct, then why cannot b be H? > Referring to Data.List.genericLength, I was confused. Because it doesn't mean that *you* get to decide what it is; it means *the caller* gets to decide, and you are obligated to honor the caller's wishes. Returning always an H violates this, because there is no way to prove that H is the only possible response. -- brandon s allbery allber...@gmail.com wandering unix systems administrator (available) (412) 475-9364 vm/sms
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