Theorem uunT12p1 41141

Description: A deduction unionizing a non-unionized collection of virtual hypotheses. (Contributed by Alan Sare, 4-Feb-2017.) (Proof modification is discouraged.) (New usage is discouraged.)

Hypothesis

Ref	Expression
uunT12p1.1	⊢ ((⊤ ∧ 𝜓 ∧ 𝜑) → 𝜒)

Assertion

Ref	Expression
uunT12p1	⊢ ((𝜑 ∧ 𝜓) → 𝜒)

Proof of Theorem uunT12p1

Step	Hyp	Ref	Expression
1		3anass 1091	. . . 4 ⊢ ((⊤ ∧ 𝜓 ∧ 𝜑) ↔ (⊤ ∧ (𝜓 ∧ 𝜑)))
2		truan 1548	. . . 4 ⊢ ((⊤ ∧ (𝜓 ∧ 𝜑)) ↔ (𝜓 ∧ 𝜑))
3	1, 2	bitri 277	. . 3 ⊢ ((⊤ ∧ 𝜓 ∧ 𝜑) ↔ (𝜓 ∧ 𝜑))
4		ancom 463	. . 3 ⊢ ((𝜑 ∧ 𝜓) ↔ (𝜓 ∧ 𝜑))
5	3, 4	bitr4i 280	. 2 ⊢ ((⊤ ∧ 𝜓 ∧ 𝜑) ↔ (𝜑 ∧ 𝜓))
6		uunT12p1.1	. 2 ⊢ ((⊤ ∧ 𝜓 ∧ 𝜑) → 𝜒)
7	5, 6	sylbir 237	1 ⊢ ((𝜑 ∧ 𝜓) → 𝜒)

Syntax hints:   → wi 4   ∧ wa 398   ∧ w3a 1083  ⊤wtru 1538

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 209  df-an 399  df-3an 1085  df-tru 1540

This theorem is referenced by: (None)