Theorem simp22 1057

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

Assertion

Ref	Expression
simp22	⊢ ((𝜑 ∧ (𝜓 ∧ 𝜒 ∧ 𝜃) ∧ 𝜏) → 𝜒)

Proof of Theorem simp22

Step	Hyp	Ref	Expression
1		simp2 1024	. 2 ⊢ ((𝜓 ∧ 𝜒 ∧ 𝜃) → 𝜒)
2	1	3ad2ant2 1045	1 ⊢ ((𝜑 ∧ (𝜓 ∧ 𝜒 ∧ 𝜃) ∧ 𝜏) → 𝜒)

Syntax hints:   → wi 4   ∧ w3a 1004

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107  ax-ia3 108

This theorem depends on definitions:  df-bi 117  df-3an 1006

This theorem is referenced by:  simpl22  1102  simpr22  1111  simp122  1156  simp222  1165  simp322  1174  prarloclem5  7719  mulgdirlem  13739