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Formal Language:
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| MereologicalDifferenceFn |
| appearance as argument number 1 |
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| appearance as argument number 2 |
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| antecedent |
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| (=> (equal ?OBJ3 (MereologicalDifferenceFn ?OBJ1 ?OBJ2)) (forall (?PART) (<=> (properPart ?PART ?OBJ3) (and (properPart ?PART ?OBJ1) (not (properPart ?PART ?OBJ2)))))) |
Merge.kif 10064-10073 | If equal X, the difference between the parts of Y, and Z, then For all Object W: W is a proper part of X if, only if W is a proper part of Y, and W is not a proper part of Z |