Some definitions of interest.
Knd	Def Knd == (IdLnkId)+Id
	Thm* Knd  Type
islocal	Def islocal(k) == isl(k)
	Thm* k:Knd. islocal(k)
bnot	Def b == if b false else true fi
	Thm* b:. b
isrcv	Def isrcv(k) == isl(k)
	Thm* k:Knd. isrcv(k)

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