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Definition df-vd1 37704
Description: Definition of virtual deduction. (Contributed by Alan Sare, 21-Apr-2011.) (New usage is discouraged.)
Assertion
Ref Expression
df-vd1 ((   𝜑   ▶   𝜓   ) ↔ (𝜑𝜓))

Detailed syntax breakdown of Definition df-vd1
StepHypRef Expression
1 wph . . 3 wff 𝜑
2 wps . . 3 wff 𝜓
31, 2wvd1 37703 . 2 wff (   𝜑   ▶   𝜓   )
41, 2wi 4 . 2 wff (𝜑𝜓)
53, 4wb 194 1 wff ((   𝜑   ▶   𝜓   ) ↔ (𝜑𝜓))
Colors of variables: wff setvar class
This definition is referenced by:  in1  37705  dfvd1ir  37707  dfvd1imp  37709  dfvd1impr  37710  dfvd2an  37716  dfvd3an  37728
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