Theorem simpr22 992

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

Assertion

Ref	Expression
simpr22	|- ( ( et /\ ( th /\ ( ph /\ ps /\ ch ) /\ ta ) ) -> ps )

Proof of Theorem simpr22

Step	Hyp	Ref	Expression
1		simp22 938	. 2 |- ( ( th /\ ( ph /\ ps /\ ch ) /\ ta ) -> ps )
2	1	adantl 262	1 |- ( ( et /\ ( th /\ ( ph /\ ps /\ ch ) /\ ta ) ) -> ps )

Syntax hints:   -> wi 4   /\ wa 97   /\ w3a 885

This theorem was proved from axioms:  ax-1 5  ax-2 6  ax-mp 7  ax-ia1 99  ax-ia2 100  ax-ia3 101

This theorem depends on definitions:  df-bi 110  df-3an 887

This theorem is referenced by: (None)