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KB Term:  Term intersection
English Word: 

  Necessity

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 17413-17414
(instance Necessity AlethicAttribute) Merge.kif 17412-17412 必要性真势属性instance

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


(termFormat ChineseLanguage Necessity "必要性") domainEnglishFormat.kif 40059-40059
(termFormat ChineseTraditionalLanguage Necessity "必要性") domainEnglishFormat.kif 40058-40058
(termFormat EnglishLanguage Necessity "necessity") domainEnglishFormat.kif 40057-40057

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


(<=>
    (modalAttribute ?FORMULA Necessity)
    (not
        (modalAttribute
            (not ?FORMULA) Possibility)))
Merge.kif 17416-17418 公式 的声明 has 必要性 的语气 若且唯若 那个 公式 的声明 doesn't have 可能性 的语气
(=>
    (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 17420-17422


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