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Theorem bnj446 31237
Description: -manipulation. (Contributed by Jonathan Ben-Naim, 3-Jun-2011.) (New usage is discouraged.)
Assertion
Ref Expression
bnj446 ((𝜑𝜓𝜒𝜃) ↔ ((𝜓𝜒𝜃) ∧ 𝜑))

Proof of Theorem bnj446
StepHypRef Expression
1 bnj345 31234 . 2 ((𝜓𝜒𝜃𝜑) ↔ (𝜑𝜓𝜒𝜃))
2 df-bnj17 31207 . 2 ((𝜓𝜒𝜃𝜑) ↔ ((𝜓𝜒𝜃) ∧ 𝜑))
31, 2bitr3i 268 1 ((𝜑𝜓𝜒𝜃) ↔ ((𝜓𝜒𝜃) ∧ 𝜑))
Colors of variables: wff setvar class
Syntax hints:  wb 197  wa 384  w3a 1107  w-bnj17 31206
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 198  df-an 385  df-3an 1109  df-bnj17 31207
This theorem is referenced by:  bnj642  31269  bnj667  31273  bnj594  31433
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