Theorem simp2lr 1023

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

Assertion

Ref	Expression
simp2lr	⊢ ((θ ∧ ((φ ∧ ψ) ∧ χ) ∧ τ) → ψ)

Proof of Theorem simp2lr

Step	Hyp	Ref	Expression
1		simplr 731	. 2 ⊢ (((φ ∧ ψ) ∧ χ) → ψ)
2	1	3ad2ant2 977	1 ⊢ ((θ ∧ ((φ ∧ ψ) ∧ χ) ∧ τ) → ψ)

Syntax hints:   → wi 4   ∧ wa 358   ∧ w3a 934

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8

This theorem depends on definitions:  df-bi 177  df-an 360  df-3an 936

This theorem is referenced by:  nnpweq  4524  sfin112  4530