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Theorem pm5.13dc 818
Description: An implication holds in at least one direction, where one proposition is decidable. Based on theorem *5.13 of [WhiteheadRussell] p. 123. (Contributed by Jim Kingdon, 30-Mar-2018.)
Assertion
Ref Expression
pm5.13dc  |-  (DECID  ps  ->  ( ( ph  ->  ps )  \/  ( ps  ->  ph ) ) )

Proof of Theorem pm5.13dc
StepHypRef Expression
1 pm5.14dc 817 1  |-  (DECID  ps  ->  ( ( ph  ->  ps )  \/  ( ps  ->  ph ) ) )
Colors of variables: wff set class
Syntax hints:    -> wi 4    \/ wo 629  DECID wdc 742
This theorem was proved from axioms:  ax-1 5  ax-2 6  ax-mp 7  ax-ia1 99  ax-ia2 100  ax-ia3 101  ax-in2 545  ax-io 630
This theorem depends on definitions:  df-bi 110  df-dc 743
This theorem is referenced by: (None)
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