Theorem un10 41115

Description: A unionizing deduction. (Contributed by Alan Sare, 28-Apr-2015.) (Proof modification is discouraged.) (New usage is discouraged.)

Hypothesis

Ref	Expression
un10.1	⊢ (   (   𝜑   ,   ⊤   )   ▶   𝜓   )

Assertion

Ref	Expression
un10	⊢ (   𝜑   ▶   𝜓   )

Proof of Theorem un10

Step	Hyp	Ref	Expression
1		tru 1537	. . . 4 ⊢ ⊤
2	1	jctr 527	. . 3 ⊢ (𝜑 → (𝜑 ∧ ⊤))
3		un10.1	. . . 4 ⊢ (   (   𝜑   ,   ⊤   )   ▶   𝜓   )
4	3	dfvd2ani 40910	. . 3 ⊢ ((𝜑 ∧ ⊤) → 𝜓)
5	2, 4	syl 17	. 2 ⊢ (𝜑 → 𝜓)
6	5	dfvd1ir 40900	1 ⊢ (   𝜑   ▶   𝜓   )

Syntax hints:   ∧ wa 398  ⊤wtru 1534  (   wvd1 40896  (   wvhc2 40907

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-tru 1536  df-vd1 40897  df-vhc2 40908

This theorem is referenced by: (None)