USE-RRULES : IRULEDEF

USE-RRULES is an intermediate rule definition.
(P1) H !A(O)
*(P2) H !B(O) Rewrite: P1
Restrictions: (INSTANCE-OF-REWRITING A(O) B(O))
Transformation: (P2 ss) ==> (P1 ss)

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USE-RRULES : MEXPR

USE-RRULES is a top-level command.
Rewrite a line. The line may be rewritten several steps,
but rewrites may not be nested.
The command format for USE-RRULES is:

 <n>USE-RRULES   P2   P1    A    B     P2-HYPS    P1-HYPS 
"LINE" "LINE" "GWFF" "GWFF" "LINELIST" "LINELIST"


The arguments have the following meaning:
P2 : Line after rewriting (higher-numbered)
P1 : Line before rewriting (lower-numbered)
A : Wff before rewriting
B : Wff after rewriting
P2-HYPS : Hypotheses
P1-HYPS : Hypotheses

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USE-RRULES : SRULE

USE-RRULES is an inference rule.
Its priority is NIL

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