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Theorem orim1i 712
Description: Introduce disjunct to both sides of an implication. (Contributed by NM, 6-Jun-1994.)
Hypothesis
Ref Expression
orim1i.1 (𝜑𝜓)
Assertion
Ref Expression
orim1i ((𝜑𝜒) → (𝜓𝜒))

Proof of Theorem orim1i
StepHypRef Expression
1 orim1i.1 . 2 (𝜑𝜓)
2 id 19 . 2 (𝜒𝜒)
31, 2orim12i 711 1 ((𝜑𝜒) → (𝜓𝜒))
Colors of variables: wff set class
Syntax hints:  wi 4  wo 664
This theorem was proved from axioms:  ax-1 5  ax-2 6  ax-mp 7  ax-ia1 104  ax-ia2 105  ax-ia3 106  ax-io 665
This theorem depends on definitions:  df-bi 115
This theorem is referenced by:  19.34  1619  dveeq2or  1744  sbequilem  1766  sbequi  1767  dvelimALT  1934  dvelimfv  1935  dvelimor  1942  r19.45av  2527  acexmidlemcase  5647  nnm1nn0  8714
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