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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

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 16204-16205
No TPTP formula. May not be expressible in strict first order.	Merge.kif 16203-16203	Necessity is an instance of alethic attribute

appearance as argument number 2

No TPTP formula. May not be expressible in strict first order.	domainEnglishFormat.kif 39976-39976
No TPTP formula. May not be expressible in strict first order.	domainEnglishFormat.kif 39975-39975
No TPTP formula. May not be expressible in strict first order.	domainEnglishFormat.kif 39974-39974

antecedent

No TPTP formula. May not be expressible in strict first order.	Merge.kif 16207-16209	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	If an agent is an instance of agent and a cognitive agent is a potential customer for the agent and the statement an entity is an instance of reserving and the entity ends up at the agent has the modal force of necessity and probability of there exists the entityES1 such that the entityES1 is an instance of reservation and the cognitive agent reserves the entityES1 and the agent fulfills the entityES1 provided that the agent is a customer of the cognitive agent holds is a real number and probability of there doesn't exist the entityES2 such that the entityES2 is an instance of reservation and the cognitive agent reserves the entityES2 and the agent fulfills the entityES2 provided that the agent is a customer of the cognitive agent holds is another real number, then the other real number is less than the real number
No TPTP formula. May not be expressible in strict first order.	Merge.kif 16211-16213	If the statement a formula has the modal force of necessity, then the statement the formula has the modal force of possibility

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