Metamath Proof Explorer

Theorem simpll1

Description: Simplification of conjunction. (Contributed by NM, 9-Mar-2012) (Proof shortened by Wolf Lammen, 23-Jun-2022)

Ref Expression
Assertion simpll1 
|- ( ( ( ( ph /\ ps /\ ch ) /\ th ) /\ ta ) -> ph )

Proof

Step Hyp Ref Expression
1 simp1 
 |-  ( ( ph /\ ps /\ ch ) -> ph )
2 1 ad2antrr 
 |-  ( ( ( ( ph /\ ps /\ ch ) /\ th ) /\ ta ) -> ph )