ASSOC-LEFT : IRULEDEF

ASSOC-LEFT is an intermediate rule definition.
*(D1) H !P(O)
(D2) H !`(ASSOC-L P(O)) Assoc: D1
Transformation: (pp D1 ss) ==> (pp D2 ss)

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ASSOC-LEFT : MEXPR

ASSOC-LEFT is a top-level command.
Rule to associate a support line leftwards. Use before
calling CASES3 or CASES4.
The command format for ASSOC-LEFT is:

 <n>ASSOC-LEFT   D1   D2    P ASSOC-L   D1-HYPS    D2-HYPS 
"LINE" "LINE" "GWFF" "GWFF" "LINELIST" "LINELIST"


The arguments have the following meaning:
D1 : Line to reassociate to the left
D2 : Line after reassociation.
P : Wff of original line
ASSOC-L : Wff of reassociated line
D1-HYPS : Hypotheses
D2-HYPS : Hypotheses

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ASSOC-LEFT : SRULE

ASSOC-LEFT is an inference rule.
Its priority is NIL

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