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Single Idea 16457

[filed under theme 7. Existence / D. Theories of Reality / 10. Vagueness / b. Vagueness of reality ]

Full Idea

One problem with Evans's argument that there are no such thing as vague identity statements is that its conclusion is plainly false. Example: 'Princeton = Princeton Borough', where it is unsettled what region 'Princeton' denotes.

Gist of Idea

There clearly are vague identity statements, and Evans's argument has a false conclusion

Source

report of Gareth Evans (Can there be Vague Objects? [1978]) by David Lewis - Vague Identity: Evans misunderstood p.319

Book Ref

'Vagueness: a Reader', ed/tr. Keefe,R /Smith,P [MIT 1999], p.319


A Reaction

Lewis endorses the view that vagueness is semantic. I certainly don't endorse Evans's argument, which hinges on a weird example of a property, as applied to Leibniz's Law.

Related Idea

Idea 16458 Semantic vagueness involves alternative and equal precisifications of the language [Lewis]


The 23 ideas from Gareth Evans

The Causal Theory of Names is wrong, since the name 'Madagascar' actually changed denotation [Evans]
We must distinguish what the speaker denotes by a name, from what the name denotes [Evans]
The intended referent of a name needs to be the cause of the speaker's information about it [Evans]
If descriptions are sufficient for reference, then I must accept a false reference if the descriptions fit [Evans]
Charity should minimize inexplicable error, rather than maximising true beliefs [Evans]
We use expressions 'deferentially', to conform to the use of other people [Evans]
Speakers intend to refer to items that are the source of their information [Evans]
How can an expression be a name, if names can change their denotation? [Evans]
A private intention won't give a name a denotation; the practice needs it to be made public [Evans]
The Homunculus Fallacy explains a subject perceiving objects by repeating the problem internally [Evans]
'Superficial' contingency: false in some world; 'Deep' contingency: no obvious verification [Evans, by Macià/Garcia-Carpentiro]
Rigid designators can be meaningful even if empty [Evans, by Mackie,P]
Evans argues (falsely!) that a contradiction follows from treating objects as vague [Evans, by Lowe]
Is it coherent that reality is vague, identities can be vague, and objects can have fuzzy boundaries? [Evans]
There clearly are vague identity statements, and Evans's argument has a false conclusion [Evans, by Lewis]
Evans assumes there can be vague identity statements, and that his proof cannot be right [Evans, by Lewis]
If a=b is indeterminate, then a=/=b, and so there cannot be indeterminate identity [Evans, by Thomasson]
There can't be vague identity; a and b must differ, since a, unlike b, is only vaguely the same as b [Evans, by PG]
Experiences have no conceptual content [Evans, by Greco]
Some representational states, like perception, may be nonconceptual [Evans, by Schulte]
Concepts have a 'Generality Constraint', that we must know how predicates apply to them [Evans, by Peacocke]
We have far fewer colour concepts than we have discriminations of colour [Evans]
The Generality Constraint says if you can think a predicate you can apply it to anything [Evans]