Some definitions of interest.
bor	Def p  q == if p true else q fi
	Thm* p,q:. (p  q)
deq	Def EqDecider(T) == eq:TTx,y:T. x = y  (eq(x,y))
	Thm* T:Type. EqDecider(T)  Type
fpf-ap	Def f(x) == 2of(f)(x)
top	Def Top == Void given Void
	Thm* Top  Type

About: IF YOU CAN SEE THIS go to /sfa/Nuprl/Shared/Xindentation_hack_doc.html