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Theorem trtrst 25016
Description:  T. is true in every step. (Contributed by FL, 20-Mar-2011.) (Proof shortened by Mario Carneiro, 30-Aug-2016.)
Assertion
Ref Expression
trtrst  |-  [.]  T.

Proof of Theorem trtrst
StepHypRef Expression
1 tru 1312 . 2  |-  T.
21ax-lmp 24978 1  |-  [.]  T.
Colors of variables: wff set class
Syntax hints:    T. wtru 1307   [.]wbox 24970
This theorem is referenced by:  untbi12i  25023
This theorem was proved from axioms:  ax-1 5  ax-2 6  ax-3 7  ax-mp 8  ax-lmp 24978
This theorem depends on definitions:  df-bi 177  df-tru 1310
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