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Theorem bnj1266 31982
Description: First-order logic and set theory. (Contributed by Jonathan Ben-Naim, 3-Jun-2011.) (New usage is discouraged.)
Hypothesis
Ref Expression
bnj1266.1 (𝜒 → ∃𝑥(𝜑𝜓))
Assertion
Ref Expression
bnj1266 (𝜒 → ∃𝑥𝜓)

Proof of Theorem bnj1266
StepHypRef Expression
1 bnj1266.1 . 2 (𝜒 → ∃𝑥(𝜑𝜓))
2 simpr 485 . 2 ((𝜑𝜓) → 𝜓)
31, 2bnj593 31915 1 (𝜒 → ∃𝑥𝜓)
Colors of variables: wff setvar class
Syntax hints:  wi 4  wa 396  wex 1771
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1787  ax-4 1801
This theorem depends on definitions:  df-bi 208  df-an 397  df-ex 1772
This theorem is referenced by:  bnj1265  31983
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