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Sigma KEE - Necessity
Necessity(必要性)

appearance as argument number 1
-------------------------


(documentation Necessity ChineseLanguage "这是指应用于必须出现 Proposition 的属性，即是 它在所有的世界上都会实现。") chinese_format.kif 3891-3892
(documentation Necessity EnglishLanguage "Attribute that applies to Propositions that are necessary, i.e. true in every possible world.") Merge.kif 17539-17540
(instance Necessity AlethicAttribute) Merge.kif 17538-17538 例 必要性 and AlethicAttribute

appearance as argument number 2
-------------------------


(termFormat ChineseLanguage Necessity "必要性") domainEnglishFormat.kif 40089-40089
(termFormat ChineseTraditionalLanguage Necessity "必要性") domainEnglishFormat.kif 40088-40088
(termFormat EnglishLanguage Necessity "necessity") domainEnglishFormat.kif 40087-40087

antecedent
-------------------------


(<=>
    (modalAttribute ?FORMULA Necessity)
    (not
        (modalAttribute
            (not ?FORMULA) Possibility)))		 Merge.kif 17542-17544 模態屬性 Formula and 必要性 模態屬性 Formula and 可能性
(=>
    (and
        (instance ?AGENT AutonomousAgent)
        (potentialCustomer ?CUST ?AGENT)
        (modalAttribute
            (and
                (instance ?R Reserving)
                (destination ?R ?AGENT)) Necessity)
        (conditionalProbability
            (exists (?RES1)
                (and
                    (instance ?RES1 Reservation)
                    (reservingEntity ?CUST ?RES1)
                    (fulfillingEntity ?AGENT ?RES1)))
            (customer ?CUST ?AGENT) ?NUM1)
        (conditionalProbability
            (not
                (exists (?RES2)
                    (and
                        (instance ?RES2 Reservation)
                        (reservingEntity ?CUST ?RES2)
                        (fulfillingEntity ?AGENT ?RES2))))
            (customer ?CUST ?AGENT) ?NUM2))
    (lessThan ?NUM2 ?NUM1))		 Dining.kif 772-795
(=>
    (modalAttribute ?FORMULA Necessity)
    (modalAttribute ?FORMULA Possibility))		 Merge.kif 17546-17548

consequent
-------------------------


(=>
    (attribute ?ORG Greedy)
    (exists (?OBJ)
        (and
            (instance ?ORG Organism)
            (instance ?OBJ Physical)
            (desires ?ORG
                (possesses ?ORG ?OBJ))
            (not
                (modalAttribute
                    (possesses ?ORG ?OBJ) Necessity)))))		 Mid-level-ontology.kif 21408-21416
(=>
    (instance ?GUN Handgun)
    (hasPurpose ?GUN
        (exists (?MAN ?S ?H ?G ?S)
            (and
                (instance ?MAN Human)
                (instance ?S Shooting)
                (instrument ?S ?GUN)
                (agent ?S ?MAN)
                (instance ?G Grabbing)
                (subProcess ?G ?S)
                (patient ?G ?GUN)
                (agent ?G ?MAN)
                (instrument ?G ?H)
                (instance ?H Hand)
                (part ?H ?MAN)
                (not
                    (modalAttribute
                        (exists (?H2)
                            (and
                                (instance ?H2 Hand)
                                (not
                                    (equal ?H ?H2))
                                (part ?H2 ?MAN)
                                (instrument ?G ?H2))) Necessity))))))		 Mid-level-ontology.kif 1982-2006
(=>
    (instance ?L Longgun)
    (hasPurpose ?L
        (exists (?S ?A)
            (and
                (instance ?S Shooting)
                (instrument ?S ?L)
                (agent ?S ?A)
                (instance ?A Human)
                (holdsDuring
                    (WhenFn ?S)
                    (exists (?G)
                        (and
                            (instance ?G Grabbing)
                            (agent ?G ?A)
                            (patient ?G ?L)
                            (modalAttribute
                                (exists (?H1 ?H2)
                                    (and
                                        (instance ?H1 Hand)
                                        (part ?H1 ?A)
                                        (instance ?H2 Hand)
                                        (part ?H2 ?A)
                                        (not
                                            (equal ?H1 ?H2))
                                        (instrument ?G ?H1)
                                        (instrument ?G ?H2))) Necessity))))))))		 Mid-level-ontology.kif 1903-1929
(=>
    (instance ?X PartInspection)
    (hasPurpose ?X
        (exists (?O ?P)
            (and
                (instance ?O SelfConnectedObject)
                (patient ?X ?O)
                (instance ?P Proposition)
                (refers ?P ?O)
                (modalAttribute
                    (conforms ?O ?P) Necessity)))))		 Economy.kif 2072-2082


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