Dear Pat, (01)
> > Dear Pat,
> >
> > This could be misinterpreted.
> >
> >>> A 4D object, in this context, is an object that can have different
> >>> state at different times.
> >>
> >> No, that is a continuant. In a very strict 4D model, there is no single
> >> 'thing' that has the various states. (Although I hasten to add, it is
very
> >> convenient to be somewhat less strict than this. I mean only to make
the
> >> conceptual distinction.)
> >
> > MW: As you know, there are two versions of 4D, one of which, stage
theory,
> > only admits timeslices with infinitesimal temporal thickness called
stages
> > which can be strung together, the other, perdurantism, allows objects to
be
> > extended in time as well as space, and that one spatio-temporal extent
can
> > be a part of another.
>
> Yes. Stage theory is the 'very strict' version I was referring to.
>
> >
> > MW: The ambiguity comes from "there is no single 'thing' that has the
> > various states".
> >
> > MW: This is true if one is talking about stage theory - there are only
the
> > various stages. However, it is not true for perdurantism, provided one
> > interprets "has" as meaning "has temporal parts".
>
> But I still think that this is a misleading way to express the intuition.
In
> 4-D perdurantism, there really is nothing that has different *states*. An
> enduring object which retains its identity through time and whose
properties
> change with time is a continuant, and continuants are incoherent in a 4-D
> universe. Put another way, a temporal part is not a state.
>
> But I am no doubt splitting hairs at this point. (02)
MW: This is just about terms being used. I agree that there is no continuant
in 4D. However, there are whole-life objects that are 4D extents that are
rough 4D equivalents to 3D continuants. That is if I was mapping between a
3D ontology and a 4D ontology then for each continuant in the 3D ontology I
would create a 4D extent in the 4D ontology. (03)
MW: I use the term state to mean a temporal part. It is not the same meaning
that it has in 3D speak, but it is within the range of what word itself will
bear. This is part of my trying to make 4D easier to say. Most of the
difficulty it seems to me is because of the terms in which it is couched in
its academic sources. I find that it is actually not that difficult to talk
in 4D. The main issue is that because 3D leaves more in the context (here
now) then 4D tends to be more verbose, with the benefit of precision. A
price well worth paying. (04)
Regards (05)
Matthew West
Information Junction
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http://www.matthew-west.org.uk/ (06)
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>
> Pat
>
> >
> > Regards
> >
> > Matthew West
> > Information Junction
> > Tel: +44 560 302 3685
> > Mobile: +44 750 3385279
> > Skype: dr.matthew.west
> > matthew.west@xxxxxxxxxxxxxxxxxxxxxxxxx
> > http://www.informationjunction.co.uk/
> > http://www.matthew-west.org.uk/
> >
> > This email originates from Information Junction Ltd. Registered in
England
> > and Wales No. 6632177.
> > Registered office: 2 Brookside, Meadow Way, Letchworth Garden City,
> > Hertfordshire, SG6 3JE.
> >
> >
> >
> >
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