Who Cites reject?
reject	Def as\[i] == if i0 tl(as) else Case of as; nil nil ; a'.as' [a' / as'\[i-1]] fi (recursive)
	Thm* A:Type, l:A List, n:. l\[n] A List
tl	Def tl(l) == Case of l; nil nil ; h.t t
	Thm* A:Type, l:A List. tl(l) A List
le_int	Def ij == j < i
	Thm* i,j:. (ij)
lt_int	Def i < j == if i < j true ; false fi
	Thm* i,j:. (i < j)
bnot	Def b == if b false else true fi
	Thm* b:. b

Syntax:

as\[i]

has structure:

reject(i; as)

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