Full Idea
Quine says if ∃x□(x>7) makes sense, then for which object x is the condition rendered true? Specify it as '9' and it is apparently rendered true, specify it as 'the number of planets' and it is apparently rendered false.
Gist of Idea
Whether a modal claim is true depends on how the object is described
Source
report of Willard Quine (Three Grades of Modal Involvement [1953]) by Kit Fine - Quine on Quantifying In p.105
Book Reference
Fine,Kit: 'Modality and Tense' [OUP 2005], p.105
A Reaction
This is normally characterised as Quine saying that only de dicto involvement is possible, and not de re involvement. Or that that all essences are nominal, and cannot be real.