[Haskell-cafe] Re: Referential Transparency and Monads

[Jonathan Cast]

On Fri, 2009-04-10 at 01:03 -0400, Brandon S. Allbery KF8NH wrote:
> On 2009 Apr 10, at 0:52, Jonathan Cast wrote:
> > On Fri, 2009-04-10 at 00:46 -0400, Brandon S. Allbery KF8NH wrote:
> >>> IO a  ~  World -> (a, World)
> >>
> >> I still don't understand this; we are passing a World and getting a
> >> World back,
> >
> > We are?  Why do you think that?
> 
> Because that's what (World -> (a,World)) means, last I checked.

Does

    undefined :: (a, World)

contain a World?

jcc