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Theorem wa6 196
Description: Weak A6.
Assertion
Ref Expression
wa6 ((a == b) == ((a' v b')' v (a v b)')) = 1
Proof of Theorem wa6
StepHypRef Expression
1 df-b 39 . 2 (a == b) = ((a' v b')' v (a v b)')
21bi1 118 1 ((a == b) == ((a' v b')' v (a v b)')) = 1
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-a5 34  ax-r1 35  ax-r2 36  ax-r4 37  ax-r5 38
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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