Pat (01)
just speculating a little on the points above and not trying to lead
anywhere specific
for a moment (02)
following the observation on the erosion of the coast
rather than defining a hole from what's around it, maybe its the contrary
its what we are looking at, perhaps, that is defined by the space around it? (03)
also, if Ontology is based on Aristotle's categories, then
which category does antimatter fit? (04)
PDM (05)
On 9/20/07, Pat Hayes <phayes@xxxxxxx> wrote:
> >Content-class: urn:content-classes:message
> >Content-Type: multipart/alternative;
> > boundary="----_=_NextPart_001_01C7FAFF.A42BF83F"
> >
> >A hole is not the same as a ³nothing² there
> >are two separate threads in this discussion: are
> >we not talking about two different ³things² (I
> >use the word advisedly and very cautiously)?
> >
>
> Quite. Im really not sure what the 'nothing' term
> is supposed to indicate. Early set theorists
> wrestled with this concept for a while before
> they came up with the empty set. Perhaps
> 'nothing' is the empty set?
>
> Regarding boundaries, I made a stab at
> ontologizing these (at least the spatial/physical
> kind) a while ago. Things get quite complicated
> quite quickly. For example, if the surface of a
> solid object is a boundary of it, then where
> exactly is the liquid when that surface is wet?
> It seemed necessary to introduce the notion of a
> 'layer' on each side of the boundary.
> Goegraphical boundaries are even more difficult:
> one has to distinguish physical from notional
> boundaries, for example (when the coastline
> erodes, does the country or the county get
> smaller?)
>
> Pat
>
> >Peter B
> >From: ontolog-forum-bounces@xxxxxxxxxxxxxxxx
> >[mailto:ontolog-forum-bounces@xxxxxxxxxxxxxxxx]
> >On Behalf Of Deborah MacPherson
> >Sent: 18 September 2007 20:01
> >To: [ontolog-forum]
> >Subject: Re: [ontolog-forum] entity: nothing
> >
> >Hi Paola -
> >
> >The Cage analogy came around to silence being
> >able to be bounded by sound. Carved sculptures
> >take away unwanted material until only the
> >essential parts remain. In museum design certain
> >content is not ready to be named but it can be
> >classified, subject areas yet to be defined are
> >left as blank, un-labeled placeholders
> >allocating space, hoping future requirements
> >will fit without rearranging everything again.
> >
> >More to your point surely is John's statement
> >"more like a boundary than pure nothingness". So
> >with the stretched metaphors above.....What do
> >you think needs to be bounded? What are opposite
> >each other inside and outside the boundaries?
> >What could possibly be consistent across a range
> >of ontologies? What existing communication
> >system like OWL, or ___, or ___, or ___ is best
> >suited to indicating a boundary? How do you know
> >when you encounter a boundary? Simply won't
> >process? How do you "see" the holes and can you
> >measure how big or small they are?
> >
> >Deborah
> >On 9/18/07,
> ><mailto:paola.dimaio@xxxxxxxxx>paola.dimaio@xxxxxxxxx
> ><<mailto:paola.dimaio@xxxxxxxxx>paola.dimaio@xxxxxxxxx >
> >wrote:
> >I am not entirely sure that we have not yet answered this, I may have
> >missed somethin
> >
> >Following the discussion on holes, the one questrion that I am left
> >with is whether
> >holes are entities as such, or non entities and
> >
> >if so
> >whether they would belong to a ' class of nothing' being
> >proposed/discussed somewhere earlier on this forum
> >
> >It looks to me that they are non entity cause they dont have a mass
> >that can be measured
> >I mean an entity is determined by its attributes and properties while
> >the only property of a hole that we can say is 'absence of energy'
> >
> >This is an attempt to bring the hole discussion into the focus of
> >current ontological question
> >
> >apologies if this is trivial
> >
> >
> >--
> >Paola Di Maio
> >School of IT
> ><http://www.mfu.ac.th>www.mfu.ac.th
> >*********************************************
> >
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--
Paola Di Maio
School of IT
www.mfu.ac.th
********************************************* (07)
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