Metamath Proof Explorer


Theorem simp11r

Description: Simplification of conjunction. (Contributed by NM, 9-Mar-2012)

Ref Expression
Assertion simp11r φψχθτηψ

Proof

Step Hyp Ref Expression
1 simp1r φψχθψ
2 1 3ad2ant1 φψχθτηψ