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Alan Ruttenberg  
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 More options Mar 3 2010, 9:17 am
From: Alan Ruttenberg <alanruttenb...@gmail.com>
Date: Wed, 3 Mar 2010 09:17:53 -0500
Local: Wed, Mar 3 2010 9:17 am
Subject: Re: [bfo-discuss] Re: Buffalo
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On Wed, Mar 3, 2010 at 6:35 AM, Phillip Lord

<phillip.l...@newcastle.ac.uk> wrote:
> Barry Smith <phism...@buffalo.edu> writes:
>> At 11:04 PM 3/1/2010, Bjoern Peters wrote:
>>> I was hoping that this discussion would clarify some of the issues I have
>>> had with bfo:spatial region in the past. No such luck.

>>> I thought 'site' was essentially defined as a spatial region whose
>>> boundaries are determined relative to some material entities. That makes
>>> sense to me, and would make the 'hole' in X a site, independent of bug
>>> occupancy.

>> The problem is that sites being determined relative to material entities as
>> boundaries, and sites being spatial regions, yield conflicts when the material
>> entities which serve as boundaries move in space, e.g. in the case of ships'
>> hulls.

> I am a little bit confused about this. Things don't move in space, they
> move relative to other things. Space can only be specified relative to
> things.

I'm confused. Are you saying there is no such thing as "space".
Physics recognizes acceleration independent of any other object. What
is that acceleration relative to?

-Alan

> So, what is the difference between the spatial region defined by the
> inside of a hull of a ship and the site defined by the same hull? What
> is the use case that requires you to make this distinction?

> Phil

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