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Full Idea
Three degrees necessity in logic or semantics: first and least is attaching a semantical predicate to the names of statements (as Nec '9>5'); second and more drastic attaches to statements themselves; third and gravest attaches to open sentences.
Gist of Idea
Necessity can attach to statement-names, to statements, and to open sentences
Source
Willard Quine (Three Grades of Modal Involvement [1953], p.158)
Book Ref
Quine,Willard: 'Ways of Paradox and other essays' [Harvard 1976], p.158
| 12219 | Whether a modal claim is true depends on how the object is described [Quine, by Fine,K] |
| 10921 | Necessity can attach to statement-names, to statements, and to open sentences [Quine] |
| 10922 | Objects are the values of variables, so a referentially opaque context cannot be quantified into [Quine] |
| 10923 | Aristotelian essentialism says a thing has some necessary and some non-necessary properties [Quine] |
| 10924 | Necessity is in the way in which we say things, and not things themselves [Quine] |