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Theorem imp5g 442
Description: An importation inference. (Contributed by Jeff Hankins, 7-Jul-2009.)
Hypothesis
Ref Expression
imp5.1 (𝜑 → (𝜓 → (𝜒 → (𝜃 → (𝜏𝜂)))))
Assertion
Ref Expression
imp5g ((𝜑𝜓) → (((𝜒𝜃) ∧ 𝜏) → 𝜂))

Proof of Theorem imp5g
StepHypRef Expression
1 imp5.1 . . 3 (𝜑 → (𝜓 → (𝜒 → (𝜃 → (𝜏𝜂)))))
21imp4b 422 . 2 ((𝜑𝜓) → ((𝜒𝜃) → (𝜏𝜂)))
32impd 411 1 ((𝜑𝜓) → (((𝜒𝜃) ∧ 𝜏) → 𝜂))
Colors of variables: wff setvar class
Syntax hints:  wi 4  wa 396
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 208  df-an 397
This theorem is referenced by: (None)
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