Metamath Proof Explorer


Theorem simpllr

Description: Simplification of a conjunction. (Contributed by Jeff Hankins, 28-Jul-2009) (Proof shortened by Wolf Lammen, 6-Apr-2022)

Ref Expression
Assertion simpllr φ ψ χ θ ψ

Proof

Step Hyp Ref Expression
1 id ψ ψ
2 1 ad3antlr φ ψ χ θ ψ