In Ocaml, the categorical initial also exists,
   thanks to polymorphic variants:
   
   	type void = [] 
   
   It is my contention that the type of procedures is wrong
   in ocaml precisely because they return unit, when they
   _should_ be returning void (that is, nothing).
   
So what typing rules do you use for the empty type? Usually a
type theory is inconsistent as soon as one has an inhabitant of
the empty type.

Bye,

Hendrik
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