Theorem 3adant3l 1178

Description: Deduction adding a conjunct to antecedent. (Contributed by NM, 8-Jan-2006.)

Hypothesis

Ref	Expression
3adant1l.1	⊢ ((φ ∧ ψ ∧ χ) → θ)

Assertion

Ref	Expression
3adant3l	⊢ ((φ ∧ ψ ∧ (τ ∧ χ)) → θ)

Proof of Theorem 3adant3l

Step	Hyp	Ref	Expression
1		3adant1l.1	. . . 4 ⊢ ((φ ∧ ψ ∧ χ) → θ)
2	1	3com13 1156	. . 3 ⊢ ((χ ∧ ψ ∧ φ) → θ)
3	2	3adant1l 1174	. 2 ⊢ (((τ ∧ χ) ∧ ψ ∧ φ) → θ)
4	3	3com13 1156	1 ⊢ ((φ ∧ ψ ∧ (τ ∧ χ)) → θ)

This proof depends on syntax axioms:   → wi 4   ∧ wa 358   ∧ w3a 934

This proof depends on axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8

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

This theorem is used by: (None)