Who Cites nequal?
nequal	Def  a  b  T == a = b  T
	Thm*  A:Type, x,y:A. (x  y)  Prop
not	Def  A == A  False
	Thm*  A:Prop. (A)  Prop

Syntax:

a  b

has structure:

nequal(T; a; b)

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