[Haskell-beginners] Bool newtype

[Imants Cekusins]

True: distinct types help. In this case a function expects a couple bool
args so  the newtypes help ensure that correct args are passed in correct
order.

However when working with vals within a function, it may be handy to be
able to deduce bool from the newtype, at least to be used with if. This may
introduce complexity so not suggesting / requesting anything. Just
thought:  something might be already available.

For example, num-like newtypes can be added, compared as are, without the
need to extract the num. Num newtypes conveniently can be derived with
"deriving".

A function you suggest is good and it works. Thank you.
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