ex.ordi

Theorem.

Arguments:

(sv), (pr), (pr),

Assertions:

(()())

Proof:

Hyp	Ref	Line	Expr
	nor.an	1	(()())
1	eqt-∀-i	2	(()())
	al.andi	3	(()())
	aln.ex	4	()
	aln.ex	5	()
4, 5	bi.bldan<>	6	(()())
2, 3, 6	2bitr	7	(()())
7	bi.bldneg	8	(()())
	df-ex	9	(()())
	or.an	10	(()())
8, 9, 10	<2bitr	11	(()())