RE: Some TAG review of "Cool URIs for the Semantic Web"

>Pat Hayes:
>
>| >Or as W.v.O. Quine, one of my other favorite philosophers, puts it,
>| >the subject matter of ontology is simple: it asks the
>| question "What is
>| >there?" and replies "Everything!"
>|
>| Quine is one of my heroes also. Do you have a citation for the above?
>
>"A curious thing about the ontological problem is its simplicity. It 
>can be put into three Anglo-Saxon monosyllables:
>'What is there?' It can be answered, moreover, in a word - 
>'Everything' - and everyone will accept this answer as true."
>
>"On What There Is", first sentence.

Thanks. Long time since I read that, obviously :-)

>
>| Then let us be honest about this. When I am thinking of unicorns,
>| there is in fact nothing I am thinking *about*. There are concepts of
>| unicorns, thoughts of unicorns, and so on; and even (if one is
>| willing to stretch ones ontology this far, which in fact I am, though
>| many are not) *possible* unicorns; but there are no unicorns. It is
>| impossible to talk *about* unicorns. The use of unicorn-talk (as
>| Quine might have put it) is either non-referential, or must be
>| understood as referring to something else.
>
>If this is true, it would force us to say: "If we use the phrase 
>{the North Korean A-bomb | the Higgs boson particle |
>extra-terrestial life } we do not know whether we are talking about 
>something or not; we may find out in the future
>whether we were or not."

Quite. And surely this is correct. In the past people spoke at length 
about phlogiston. We now know they weren't talking about it, however, 
because it wasn't there.

>I don't think Quine would hold such a radical position. He would 
>probably say we need to replace the everyday word
>'unicorn' with some definite description such as 'animals which look 
>like horses and have a single horn on their head',
>and would say it makes perfect sense to talk about the redefined 
>'unicorns', such as when we say 'It is not true that
>there exist animals which look like horses and have a single horn on 
>their head'.

Seems to me that "Foodles do not exist" is *not* about foodles. It is 
about the property of foodle-hood, if you like, but its not about 
actual foodles. And although I am not able to cite the source, I am 
under the impression that I learned this from Quine.

>And he would certainly say that from
>the fact we talk about unicorns we cannot infer the existence of 
>unicorns. At least, to me this seems his entire point
>in the above-mentioned article.
>
>And to me it seems fine to use a word like 'subject' or 'resource' 
>for all such constructs, existing or not, if we keep
>in mind we use 'resource' or 'subject' in a more technical sense and 
>not the everyday English sense.
>
>| In order to talk
>| about unicorns, you have to admit them into some kind of at least
>| logical existence. For authorities, if you wish, go to Quine and
>| Wittgenstein.
>
>This is the position Quine attacks: "If Pegasus were not, McX 
>argues, we should not be talking about anything when we
>use the word; therefore it would be nonsense to say even that 
>Pegasus is not" from, again, "On What There Is". Which
>position Quine of course refutes: "we commit ourselves to an 
>ontology containing Pegasus when we say Pegasus is. But we
>do not commit ourselves to an ontology containing Pegasus ... when 
>we say that Pegasus ... is not."

He refutes McX's conclusion ("therefore it would be nonsense"... 
which sounds like a reductio argument) but not the idea that we are 
not talking about anything when we say that Pegasus is not. As Quine 
points out, to deny the existence of something does not (contra McX) 
implicitly commit one to agreeing to its existence.

Pat


>
>Marc de Graauw
>
>www.marcdegraauw.com


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Received on Tuesday, 25 September 2007 06:22:51 UTC