alexor-pre

Theorem.

Arguments:

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

Assertions:

(()())

Proof:

Hyp	Ref	Line	Expr
	al.imdi	1	(()())
	orcom	2	(()())
	df-or	3	(()())
2, 3	bitr	4	(()())
4	eqt-∀-i	5	(()())
	orcom	6	(()())
	df-ex	7	()
7	bi.bldor>	8	(()())
	im.or	9	(()())
6, 8, 9	<2bitr	10	(()())
1, 5, 10	<imtr	11	(()())