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

Theorem nottru 1301
Description: A identity. (Contributed by Anthony Hart, 22-Oct-2010.)
Assertion
Ref Expression
nottru

Proof of Theorem nottru
StepHypRef Expression
1 df-fal 1248 . 2
21bicomi 123 1
Colors of variables: wff set class
Syntax hints:   wn 3   wb 98   wtru 1243   wfal 1247
This theorem was proved from axioms:  ax-1 5  ax-2 6  ax-mp 7  ax-ia1 99  ax-ia2 100  ax-ia3 101
This theorem depends on definitions:  df-bi 110  df-fal 1248
This theorem is referenced by:  truxortru  1307
  Copyright terms: Public domain W3C validator