NEW-MATING-AFTER-DUP : FLAGNEW-MATING-AFTER-DUP is a flag or parameter.
This flag affects the way a complete mating is constructed after
duplication. If nil, mating search attempts to extend only those matings
which were inextensible earlier. Otherwise, it starts constructing new
NEW-MATING-AFTER-DUP takes values of type BOOLEAN.
It belongs to subjects MS93-1 MS92-9 MS91-7 MS91-6 MS90-9 MS90-3 MS89 MS88 MATING-SEARCH .
Its default value is NIL
Its current value is NIL.
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