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Sigma KEE - Necessity
Necessity(necessity)essential, fatal, fateful, ineluctable, inescapable, inevitable, inevitably, must, necessarily, necessary, necessity, needfully, needs, of_necessity, prerequisite, requirement, requisite, unavoidable, unnecessary, unneeded

appearance as argument number 1
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No TPTP formula. May not be expressible in strict first order. chinese_format.kif 3891-3892
No TPTP formula. May not be expressible in strict first order. Merge.kif 17153-17154
No TPTP formula. May not be expressible in strict first order. Merge.kif 17152-17152 Necessity is an instance of alethic attribute

appearance as argument number 2
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No TPTP formula. May not be expressible in strict first order. domainEnglishFormat.kif 40044-40044
No TPTP formula. May not be expressible in strict first order. domainEnglishFormat.kif 40043-40043
No TPTP formula. May not be expressible in strict first order. domainEnglishFormat.kif 40042-40042

antecedent
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No TPTP formula. May not be expressible in strict first order. Merge.kif 17156-17158 The statement a formula has the modal force of necessity if and only if the statement the formula doesn't have the modal force of possibility
No TPTP formula. May not be expressible in strict first order. Dining.kif 725-748
No TPTP formula. May not be expressible in strict first order. Merge.kif 17160-17162


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