Some definitions of interest.
Knd	Def Knd == (IdLnkId)+Id
	Thm* Knd  Type
IdLnk	Def IdLnk == IdId
	Thm* IdLnk  Type
Id	Def Id == Atom
	Thm* Id  Type
locl	Def locl(a) == inr(a)
	Thm* a:Id. locl(a)  Knd

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