ILE Home Intuitionistic Logic Explorer < Previous   Next >
Nearby theorems
Mirrors  >  Home  >  ILE Home  >  Th. List  >  pm1.2 Unicode version

Theorem pm1.2 706
Description: Axiom *1.2 (Taut) of [WhiteheadRussell] p. 96. (Contributed by NM, 3-Jan-2005.) (Revised by NM, 10-Mar-2013.)
Assertion
Ref Expression
pm1.2  |-  ( (
ph  \/  ph )  ->  ph )

Proof of Theorem pm1.2
StepHypRef Expression
1 id 19 . 2  |-  ( ph  ->  ph )
21, 1jaoi 669 1  |-  ( (
ph  \/  ph )  ->  ph )
Colors of variables: wff set class
Syntax hints:    -> wi 4    \/ wo 662
This theorem was proved from axioms:  ax-1 5  ax-2 6  ax-mp 7  ax-ia1 104  ax-ia2 105  ax-ia3 106  ax-io 663
This theorem depends on definitions:  df-bi 115
This theorem is referenced by:  oridm  707  sbequi  1764  swoer  6272
  Copyright terms: Public domain W3C validator