Theorem iin2

Description: in2 without virtual deductions. (Contributed by Alan Sare, 20-Jun-2011) (Proof modification is discouraged.) (New usage is discouraged.)

	Ref	Expression
Hypothesis	iin2.1	|- ( ph -> ( ps -> ch ) )
Assertion	iin2	|- ( ph -> ( ps -> ch ) )

Proof

Step	Hyp	Ref	Expression
1		iin2.1	|- ( ph -> ( ps -> ch ) )