Metamath Proof Explorer


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 ) )