Theorem pm5.13dc 902

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

Step	Hyp	Ref	Expression
1		pm5.14dc 901	1 |- (DECID ps -> ( ( ph -> ps ) \/ ( ps -> ph ) ) )

Syntax hints:   -> wi 4   \/ wo 698  DECID wdc 824

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 105  ax-ia2 106  ax-ia3 107  ax-in2 605  ax-io 699

This theorem depends on definitions:  df-bi 116  df-dc 825

This theorem is referenced by: (None)