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Theorem falxortru 1443
Description: A \/_ identity. (Contributed by David A. Wheeler, 9-May-2015.)
Assertion
Ref Expression
falxortru

Proof of Theorem falxortru
StepHypRef Expression
1 df-xor 1364 . 2
2 falbitru 1435 . . 3
32notbii 296 . 2
4 notfal 1432 . 2
51, 3, 43bitri 271 1
Colors of variables: wff setvar class
Syntax hints:  -.wn 3  <->wb 184  \/_wxo 1363   wtru 1396   wfal 1400
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 185  df-xor 1364  df-tru 1398  df-fal 1401
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