INSTANCE-OF-REWRITING : WFFOP

INSTANCE-OF-REWRITING is a wff operation.
Test to see whether one gwff can be obtained from another
by non-overlapping rewrite rules.
 
The calling scheme for INSTANCE-OF-REWRITING is:

(INSTANCE-OF-REWRITING INWFF OUTWFF)
"GWFF" "GWFF"


The result is of type BOOLEAN.

The arguments have the following meaning:
INWFF : gwff before rewriting
OUTWFF : gwff after rewriting

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