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Theorem spimed 2243
Description: Deduction version of spime 2244. (Contributed by NM, 14-May-1993.) (Revised by Mario Carneiro, 3-Oct-2016.) (Proof shortened by Wolf Lammen, 19-Feb-2018.)
Hypotheses
Ref Expression
spimed.1 (𝜒 → Ⅎ𝑥𝜑)
spimed.2 (𝑥 = 𝑦 → (𝜑𝜓))
Assertion
Ref Expression
spimed (𝜒 → (𝜑 → ∃𝑥𝜓))

Proof of Theorem spimed
StepHypRef Expression
1 spimed.1 . . 3 (𝜒 → Ⅎ𝑥𝜑)
21nf5rd 2054 . 2 (𝜒 → (𝜑 → ∀𝑥𝜑))
3 ax6e 2238 . . . 4 𝑥 𝑥 = 𝑦
4 spimed.2 . . . 4 (𝑥 = 𝑦 → (𝜑𝜓))
53, 4eximii 1754 . . 3 𝑥(𝜑𝜓)
6519.35i 1795 . 2 (∀𝑥𝜑 → ∃𝑥𝜓)
72, 6syl6 34 1 (𝜒 → (𝜑 → ∃𝑥𝜓))
Colors of variables: wff setvar class
Syntax hints:  wi 4  wal 1473  wex 1695  wnf 1699
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1713  ax-4 1728  ax-5 1827  ax-6 1875  ax-7 1922  ax-12 2034  ax-13 2234
This theorem depends on definitions:  df-bi 196  df-an 385  df-ex 1696  df-nf 1701
This theorem is referenced by:  spime  2244  2ax6elem  2437
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