Dear Doug, (01)
> >> In a refinery, for example, with fluids rapidly passing through
> >> some
> >> length of pipe, are the fluids inside the pipe at any given time
> >> considered as 'part'
> >> of the pipe? Are the crew of a ship below decks part of the ship?
> > MW: Generally, no. Only if you were considering the all-up weight (say
> > for foundations design or loaded weight) would the answer be yes -
> > which just makes the point that there are two answers.
> > ...
> > MW: I don't think you can make general rules. You have to look at the
> > purpose of the object and construct it to meet that purpose.
> This agrees with my original statement that identity is normally defined
> people. (02)
MW: That depends on the kind of object. All the objects on a refinery are
intentionally constructed, so of course their identity is determined by us.
I would be less confident of making that assertion about naturally occurring
objects. On the other hand I am happy that you can talk about any
spatio-temporal extent, or any set you can construct, i.e. the existence of
things is not necessarily defined in nature. (03)
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> -- doug f
> > Regards
> > Matthew West
> > Information Junction
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