Theorem simp22 1015

Description: Simplification of doubly triple conjunction. (Contributed by NM, 17-Nov-2011.)

Assertion

Ref	Expression
simp22	|- ( ( ph /\ ( ps /\ ch /\ th ) /\ ta ) -> ch )

Proof of Theorem simp22

Step	Hyp	Ref	Expression
1		simp2 982	. 2 |- ( ( ps /\ ch /\ th ) -> ch )
2	1	3ad2ant2 1003	1 |- ( ( ph /\ ( ps /\ ch /\ th ) /\ ta ) -> ch )

Syntax hints:   -> wi 4   /\ w3a 962

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 105  ax-ia2 106  ax-ia3 107

This theorem depends on definitions:  df-bi 116  df-3an 964

This theorem is referenced by:  simpl22  1060  simpr22  1069  simp122  1114  simp222  1123  simp322  1132  prarloclem5  7308