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 φ ψ χ
Assertion iin2 φ ψ χ

Proof

Step Hyp Ref Expression
1 iin2.1 φ ψ χ