From: pat hayes (phayes@ai.uwf.edu)
Date: 01/15/01
Jim Hendler wrote: >At 9:55 -0500 1/12/01, Peter F. Patel-Schneider wrote: >>....... >>OK, now that there is a DAML+OIL release, it is time to try to put a >>spanner in the works. (Not that it is time to sabotage the release, it is >>just that it is now time to see what problems remain, so that the next >>release can fix them.) I expect that this list is not complete! >> >> >>Problem 1: The lack of a theory of identity (or equality, or equivalence) >> > >I agree with Peter that this is important, and that we need it. >However, I wonder if the correct solution isn't a langauge feature >to allow it to be said -- we have the ability to say things are the >same class or same property -- why not a similar explicit construct >for same entity? I think the point is not that we couldn't add the ability to say something like same-entity, but more the issue of what we would mean when we say it. Peter refers to a lack of a *theory* of identity. Cunning man, he knows that a 'theory of identity' amounts to a model theory. Pat Hayes --------------------------------------------------------------------- IHMC (850)434 8903 home 40 South Alcaniz St. (850)202 4416 office Pensacola, FL 32501 (850)202 4440 fax phayes@ai.uwf.edu http://www.coginst.uwf.edu/~phayes
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