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- Xref: sparky sci.logic:2506 sci.philosophy.tech:4655
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- From: holmes@opal.idbsu.edu (Randall Holmes)
- Subject: Re: What is a property? (was: No Reification Here)
- Message-ID: <1992Dec30.190527.3145@guinness.idbsu.edu>
- Sender: usenet@guinness.idbsu.edu (Usenet News mail)
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- Organization: Boise State University
- References: <1hsmvoINNjc4@im4u.cs.utexas.edu>
- Date: Wed, 30 Dec 1992 19:05:27 GMT
- Lines: 31
-
- In article <1hsmvoINNjc4@im4u.cs.utexas.edu> turpin@cs.utexas.edu (Russell Turpin) writes:
- >-*----
- >Does everyone in this discussion have the same notion of
- >property? Perhaps just to make sure, or to enlighten me, one of
- >the participants would be kind enough to tell me what this notion
- >is.
- >
- >If I were asked whether every meaningful predicate expresses a
- >property, my first answer would be "yes, of course." Even an
- >expressive or attitudinal predicate such as "yummy" expresses a
- >property that some things have, namely, eliciting the attitude or
- >expression from the concerned speaker. (Of course, to say this I
- >must either reify the predicate or relativize my logic. Is this
- >Zeleny's point?)
- >
- >Russell
-
- I follow Quine in saying that properties are simply extensions of
- those predicates which happen to have extensions; i.e., sets. General
- predicates which do not necessarily have extensions can always be
- quoted, and quoted predicates can be disguised as proper classes.
- I admit no intermediate realm of intensions between quoted predicates
- and frank sets, although such a realm can be built subsequently using
- equivalence classes of syntactical objects. This means that my notion
- of "property" differs quite a lot from Zeleny's, for example.
-
- --
- The opinions expressed | --Sincerely,
- above are not the "official" | M. Randall Holmes
- opinions of any person | Math. Dept., Boise State Univ.
- or institution. | holmes@opal.idbsu.edu
-