Metamath Proof Explorer


Theorem simplbi2comt

Description: Closed form of simplbi2com . (Contributed by Alan Sare, 22-Jul-2012)

Ref Expression
Assertion simplbi2comt φψχχψφ

Proof

Step Hyp Ref Expression
1 biimpr φψχψχφ
2 1 expcomd φψχχψφ