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Theorem pm4.82 928
Description: Theorem *4.82 of [WhiteheadRussell] p. 122. (Contributed by NM, 3-Jan-2005.)
Assertion
Ref Expression
pm4.82

Proof of Theorem pm4.82
StepHypRef Expression
1 pm2.65 172 . . 3
21imp 429 . 2
3 pm2.21 108 . . 3
4 pm2.21 108 . . 3
53, 4jca 532 . 2
62, 5impbii 188 1
Colors of variables: wff setvar class
Syntax hints:  -.wn 3  ->wi 4  <->wb 184  /\wa 369
This theorem is referenced by:  alimp-no-surprise  33196
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-an 371
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