sylan>

Theorem.

Arguments:

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

Hypotheses:

()

(())

Assertions:

(())

Proof:

Hyp	Ref	Line	Expr
	Hypo	1	()
		2	(())
2	exp	3	(())
1, 3	rpi32	4	(())
4	imp	5	(())