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Theorem 3or6 1263
Description: Analog of or4 514 for triple conjunction. (Contributed by Scott Fenton, 16-Mar-2011.)
Assertion
Ref Expression
3or6

Proof of Theorem 3or6
StepHypRef Expression
1 or4 514 . . 3
2 or4 514 . . . 4
32orbi1i 506 . . 3
41, 3bitr2i 241 . 2
5 df-3or 935 . 2
6 df-3or 935 . . 3
7 df-3or 935 . . 3
86, 7orbi12i 507 . 2
94, 5, 83bitr4i 268 1
Colors of variables: wff setvar class
Syntax hints:   wb 176   wo 357   w3o 933
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  df-3or 935
This theorem is referenced by: (None)
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