[Haskell-beginners] Enum Float and Double

[harry]

Why are Float and Double Enums? It doesn't seem to achieve anything useful,
other than creating confusion such as
http://stackoverflow.com/questions/7290438/haskell-ranges-and-floats. I've
seen some threads from several years ago pointing out numerous problems with
any attempt at giving these instances a sensible definition, but no
explanation as to why they were created in the first place, or why they
haven't been removed since.