Lots of grammatical rules are of If-Then form, such as "If X has property A and property B then X has property C". To express this in network form, the best I can come up with is:
1. licensing rule
X isa A
X isa B
X isa C
2. prohibitive rule
NOT:
X isa A
X isa B
not: X isa C
How are the two Nots in Rule (2) expressed in network terms?
--And.
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