Metamath Proof Explorer


Theorem simprll

Description: Simplification of a conjunction. (Contributed by Jeff Hankins, 28-Jul-2009)

Ref Expression
Assertion simprll φ ψ χ θ ψ

Proof

Step Hyp Ref Expression
1 simpl ψ χ ψ
2 1 ad2antrl φ ψ χ θ ψ