[Haskell-cafe] Very freaky
stefanor at cox.net
Tue Jul 10 16:06:38 EDT 2007
On Tue, Jul 10, 2007 at 08:59:16PM +0100, Andrew Coppin wrote:
>> http://haskell.org/haskellwiki/Curry-Howard-Lambek_correspondence might
>> be interesting - same idea, but written for a Haskell audience.
> An interesting read - although again a little over my head.
> I find myself wondering... A polymorphic type signature such as (a -> b) ->
> a -> b says "given that a implies b and a is true, b is true". But what
> does, say, "Maybe x -> x" say?
Given that x may or may not be true, x is definitely true.
Which, of course, is absurd.
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