Metamath Proof Explorer


Theorem simp1lr

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

Ref Expression
Assertion simp1lr φ ψ χ θ τ ψ

Proof

Step Hyp Ref Expression
1 simplr φ ψ χ ψ
2 1 3ad2ant1 φ ψ χ θ τ ψ