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Theorem falxortru 1360
Description: A  \/_ identity. (Contributed by David A. Wheeler, 9-May-2015.)
Assertion
Ref Expression
falxortru  \/_

Proof of Theorem falxortru
StepHypRef Expression
1 df-xor 1305 . 2  \/_
2 falbitru 1352 . . 3
32notbii 287 . 2
4 notfal 1349 . 2
51, 3, 43bitri 262 1  \/_
Colors of variables: wff setvar class
Syntax hints:   wn 3   wb 176    \/_ wxo 1304   wtru 1316   wfal 1317
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-xor 1305  df-tru 1319  df-fal 1320
This theorem is referenced by: (None)
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