Theorem pm3.14 325

Description: Theorem *3.14 of [WhiteheadRussell] p. 111.

Assertion

Ref	Expression
pm3.14	|- ((-. ph \/ -. ps) -> -. (ph /\ ps))

Proof of Theorem pm3.14

Step	Hyp	Ref	Expression
1		pm3.1 321	. 2 |- ((ph /\ ps) -> -. (-. ph \/ -. ps))
2	1	con2i 102	1 |- ((-. ph \/ -. ps) -> -. (ph /\ ps))

Syntax hints:  -. wn 2   -> wi 3   \/ wo 229   /\ wa 230

This theorem was proved from axioms:  ax-1 4  ax-2 5  ax-3 6  ax-mp 7

This theorem depends on definitions:  df-bi 154  df-or 231  df-an 232

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