Il 18/mar/2015 18:18 "Nadir Sampaoli" <nadirsampa...@gmail.com> ha scritto:
>
>     and :: Bool → Bool → Bool
>     and True _ = True
>     and _ x = x
>

Eh, scusate, intendevo:

    and :: Bool → Bool → Bool
    and False _ = False
    and _ x = x
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