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| stepfather |
| appearance as argument number 1 |
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| (documentation stepfather EnglishLanguage "(stepfather ?PERSON ?FATHER) means that ?FATHER is the stepfather of ?PERSON, i.e. ?FATHER is the spouse of the mother of ?PERSON, without also being the father of ?PERSON.") | Mid-level-ontology.kif 25462-25464 | |
| (domain stepfather 1 Human) | Mid-level-ontology.kif 25465-25465 | The number 1 argument of stepfather is an instance of human |
| (domain stepfather 2 Man) | Mid-level-ontology.kif 25466-25466 | The number 2 argument of stepfather is an instance of man |
| (subrelation stepfather legalRelation) | Mid-level-ontology.kif 25467-25467 | stepfather is a subrelation of legal relation |
| (instance stepfather BinaryPredicate) | Mid-level-ontology.kif 25468-25468 | stepfather is an instance of binary predicate |
| appearance as argument number 2 |
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| antecedent |
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| (<=> (stepfather ?P ?F) (exists (?M) (and (mother ?P ?M) (spouse ?F ?M) (not (father ?P ?F))))) |
Mid-level-ontology.kif 25470-25477 | X is the stepfather of Y if, only if there exists Z such that Z is a mother of Y, X is the spouse of Z, and X is not a father of Y |