Theorem simp2d 917

Description: Deduce a conjunct from a triple conjunction. (Contributed by NM, 4-Sep-2005.)

Hypothesis

Ref	Expression
3simp1d.1	⊢ (𝜑 → (𝜓 ∧ 𝜒 ∧ 𝜃))

Assertion

Ref	Expression
simp2d	⊢ (𝜑 → 𝜒)

Proof of Theorem simp2d

Step	Hyp	Ref	Expression
1		3simp1d.1	. 2 ⊢ (𝜑 → (𝜓 ∧ 𝜒 ∧ 𝜃))
2		simp2 905	. 2 ⊢ ((𝜓 ∧ 𝜒 ∧ 𝜃) → 𝜒)
3	1, 2	syl 14	1 ⊢ (𝜑 → 𝜒)

Syntax hints:   → wi 4   ∧ w3a 885

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

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

This theorem is referenced by:  simp2bi  920  erinxp  6180  addcanprleml  6712  addcanprlemu  6713  ltmprr  6740  lelttrdi  7421  ixxdisj  8772  ixxss1  8773  ixxss2  8774  ixxss12  8775  iccgelb  8801  iccss2  8813  icodisj  8860  flqdiv  9163  immul  9479