Theorem pm2.32 262

Description: Theorem *2.32 of [WhiteheadRussell] p. 105.

Assertion

Ref	Expression
pm2.32	|- (((ph \/ ps) \/ ch) -> (ph \/ (ps \/ ch)))

Proof of Theorem pm2.32

Step	Hyp	Ref	Expression
1		orass 260	. 2 |- (((ph \/ ps) \/ ch) <-> (ph \/ (ps \/ ch)))
2	1	biimp 151	1 |- (((ph \/ ps) \/ ch) -> (ph \/ (ps \/ ch)))

Syntax hints:   -> wi 3   \/ wo 222

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 147  df-or 224

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