Metamath Proof Explorer


Theorem simp-4r

Description: Simplification of a conjunction. (Contributed by Mario Carneiro, 4-Jan-2017) (Proof shortened by Wolf Lammen, 24-May-2022)

Ref Expression
Assertion simp-4r φ ψ χ θ τ ψ

Proof

Step Hyp Ref Expression
1 id ψ ψ
2 1 ad4antlr φ ψ χ θ τ ψ