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Theorem bnj937 34764
Description: First-order logic and set theory. (Contributed by Jonathan Ben-Naim, 3-Jun-2011.) (New usage is discouraged.)
Hypothesis
Ref Expression
bnj937.1 (𝜑 → ∃𝑥𝜓)
Assertion
Ref Expression
bnj937 (𝜑𝜓)
Distinct variable group:   𝜓,𝑥
Allowed substitution hint:   𝜑(𝑥)

Proof of Theorem bnj937
StepHypRef Expression
1 bnj937.1 . 2 (𝜑 → ∃𝑥𝜓)
2 19.9v 1981 . 2 (∃𝑥𝜓𝜓)
31, 2sylib 218 1 (𝜑𝜓)
Colors of variables: wff setvar class
Syntax hints:  wi 4  wex 1776
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1792  ax-4 1806  ax-5 1908  ax-6 1965
This theorem depends on definitions:  df-bi 207  df-ex 1777
This theorem is referenced by:  bnj1265  34805  bnj1379  34823  bnj852  34914  bnj1148  34989  bnj1154  34992  bnj1189  35002  bnj1245  35007  bnj1286  35012  bnj1311  35017  bnj1371  35022  bnj1374  35024  bnj1498  35054  bnj1514  35056
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