'Ocham' responds:
You say "Although Caesar no longer exists, he did exist, and so it is reasonable to take 'Caesar' as having a referent. " It would be correct to say that the proper name 'Caesar' *had* a referent. But does it *have* a referent? If it has (present tense) a referent, then there is a relation:
refers('Caesar', Caesar)
between the word and *something*. And if we accept that a *something* has to be an existing thing, we have the paradox that Caesar does not exist, but that 'Caesar' refers to *something*, and so he does exist after all.
The medievals were more conscious of this paradox because they were before Einstein. After Einstein, we have this sense that things that existed in the past are in some sense still existing, because time is a dimension of space, and because everything in space exists. So we don't see the problem of the referent of 'Caesar' in the way we see a problem with the referent of 'Zeus'.
I tend to side with the medievals. Einstein gives us no philosophical justification for the view that things do not *change* over time, which includes a change from existing to not existing. And if the referent of a proper name may cease to exist through being corrupted, how is it that a semantic relation can still exist between the name (which admittedly still exists) and the referent (which doesn't)?
This is an excellent objection and it shows that what I said is far from self-evident. The problem may be set forth as an aporetic triad:
1. Reference is a relation that presupposes the existence of its relata.
2. There is reference to past individuals.
3. Presentism: The present alone exists; past and future items do not exist.
The limbs of this triad cannot all be true. The conjunction of (1) and (2) entails the negation of (3). The conjunction of (1) and (3) entails the negation of (2). And the conjunction of (2) and (3) entails the negation of (1).
The triad is interesting because each of its limbs has a strong claim on our acceptance. And yet they cannot all be true. To solve the problem one must reject one of the limbs. But which one? It seems to me that (2) is the least rejectable of the three. Surely we do refer to past individuals using proper names. Boston's Scollay Square no longer exists. But I nonetheless refer to it when I say 'My father visited Scollay Square while on shore leave during WWII.' I should think that 'Scollay Square' is just as referential as 'Harvard Square.' Since (2) is the most datanic of the three limbs, it is the least rejectable. This leaves (1) and (2).
One could reject (1) by maintaining that reference is a relation that presupposes the existence or the having existed of its relata. Or one could reject (3) by adopting a B-theoryof time according to which past, present, and future items all enjoy tenseless existence. Neither of these solutions is without difficulty.
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