Metamath Proof Explorer


Theorem simp33r

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

Ref Expression
Assertion simp33r τηχθφψψ

Proof

Step Hyp Ref Expression
1 simp3r χθφψψ
2 1 3ad2ant3 τηχθφψψ