ja-pre

Theorem.

Arguments:

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

Hypotheses:

()

()

Assertions:

(())

Proof:

Hyp	Ref	Line	Expr
	Hypo	1	()
		2	()
	mpclosed	3	((()))
1, 3	rpi33	4	((()))
2	ax1	5	((()))
4, 5	casei	6	(())