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Theorem mtp-xorOLD 1537
Description: Obsolete version of mtp-xor 1536 as of 11-Nov-2017. (Contributed by David A. Wheeler, 4-Jul-2016.) (New usage is discouraged.) (Proof modification is discouraged.)
Hypotheses
Ref Expression
mtp-xor.1
mtp-xor.2  \/_
Assertion
Ref Expression
mtp-xorOLD

Proof of Theorem mtp-xorOLD
StepHypRef Expression
1 mtp-xor.1 . 2
2 mtp-xor.2 . . . . 5  \/_
3 df-xor 1305 . . . . 5  \/_
42, 3mpbi 199 . . . 4
5 bicom 191 . . . 4
64, 5mtbi 289 . . 3
7 xor3 346 . . 3
86, 7mpbi 199 . 2
91, 8mpbir 200 1
Colors of variables: wff setvar class
Syntax hints:   wn 3   wb 176    \/_ wxo 1304
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
This theorem is referenced by: (None)
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