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Theorem olci 380
Description: Deduction introducing a disjunct. (Contributed by NM, 19-Jan-2008.) (Proof shortened by Wolf Lammen, 14-Nov-2012.)
Hypothesis
Ref Expression
orci.1
Assertion
Ref Expression
olci

Proof of Theorem olci
StepHypRef Expression
1 orci.1 . . 3
21a1i 10 . 2
32orri 365 1
Colors of variables: wff setvar class
Syntax hints:   wn 3   wo 357
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 177  df-or 359
This theorem is referenced by:  falortru  1342  ltcirr  6272
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