Proposal: Data.Bool.implies

[Henning Thielemann]

On Mon, 18 Jan 2016, Brent Yorgey wrote:

> I disagree.  The equivalence between `implies` and (<=) depends on the 
> ordering chosen for Bool, which is completely arbitrary, and is not 
> something people thinking about logic should be expected to know or 
> learn.  For example, the Coq standard library happens to choose the 
> other order, with True < False.

I can confirm that the order is arbitrary. I used a Modula II 
implementation where True was represented as -1, because that is the bit 
pattern where all bits are set.