Existential quantification

by | Apr 12, 2021

Home / Glossary / Existential quantification

Existential quantification is quantification with the #$thereExists quantifier. For example, the following existentially quantified CycL sentence states that there is some unmarried human adult:

(thereExists ?SINGLE
  (and
    (isa ?SINGLE HumanAdult) 
    (maritalStatus ?SINGLE Single)))

Also see universal quantification.