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Theorem r3b 442
Description: Orthomodular law from weak equivalential detachment (WBMP).
Hypothesis
Ref Expression
r3b.1 (c v c') = (a == b)
Assertion
Ref Expression
r3b a = b

Proof of Theorem r3b
StepHypRef Expression
1 df-t 41 . . 3 1 = (c v c')
2 r3b.1 . . 3 (c v c') = (a == b)
31, 2ax-r2 36 . 2 1 = (a == b)
4 1b 117 . 2 (1 == (a == b)) = (a == b)
53, 4wed 441 1 a = b
Colors of variables: term
Syntax hints:   = wb 1  'wn 4   == tb 5   v wo 6  1wt 8
This theorem was proved from axioms:  ax-a1 30  ax-a2 31  ax-a4 33  ax-a5 34  ax-r1 35  ax-r2 36  ax-r4 37  ax-r5 38  ax-r3 439
This theorem depends on definitions:  df-b 39  df-a 40  df-t 41  df-f 42
This theorem is referenced by: (None)
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