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RE: Categorization (was RE: [ontac-dev] Representation of attributes)

To: ONTAC Taxonomy-Ontology Development Discussion <ontac-dev@xxxxxxxxxxxxxx>
From: "Smith, Barry" <phismith@xxxxxxxxxxx>
Date: Sat, 04 Feb 2006 08:40:31 -0500
Message-id: <phismith$67.20.232.145$.7.0.1.0.2.20060204083615.04cf3fc0@xxxxxxxxxxx>

>MW: Noone has yet been able to explain the difference (or even offer an
>explanation) though more than one has asserted a difference. I am simply
>seeking enlightenment.    (01)

Sets are mathematical objects; the set-membership relation is an 
abstract relation, which obtains independently of time and change. 
Sets can be defined arbitrarily, as in the {the moon, Matthew West, 
redness, 27} case. Sets are subject to arbitrary iterations, 
combinations and intersections, ad nauseam, as in the    (02)

{{{{{{{{{{{{{{{{{{{{Matthew West}}}}}}}}}}}}}}}}}}}    (03)

case. Which sets exist is a matter of mathematics and of arbitrary definition.    (04)

Types are entities (something like invariant patterns, commonalities, 
kinds) in reality. Which types exist changes from epoch to epoch 
(Darwin tells us) and even from year to year (as new varities of 
potato chip are invented). Which types exist is a matter of 
observation and scientific exeriment. Types are not subject to 
arbitrary iterations, combinations and intersections. There is no 
type 'rabbit or steering wheel'.    (05)

BS    (06)




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