On Aug 6, 2009, at 12:33 PM, ingvar_johansson wrote: (01)
> Pat Hayes wrote:
>
>> I think this is not what is meant, if I understand the 'trope'
>> language. Take a concrete case, a measurement of length in meters and
>> two identical sticks A and B, with exactly the same length. There is
>> one property here, called "length", which applies to both sticks and
>> produces the same value in each case, say 3.1 meters. So: two sticks,
>> one property, one length value of that property.
>
> I think the solution is to accept the existence of both properties and
> tropes (property instances). So: two sticks, one property, two
> property
> instances, one length value of that property that are instantiated
> twice.
> (02)
Well, my purpose was only to make the difference clear; but as to my
own opinion, I see no good reason to allow tropes. They serve only to
confuse things, and have no useful ontological role. As John Sowa has
mentioned, one can always consider a trope to be a subproperty of the
original property, one which applies only to one individual. That is
if tropes are felt to be indispensable in your metaphysics. On this
view, the length of A is identical to the length of B, and the A-
length of A is equal to the length of A, but B simply does not have an
A-length. (03)
Pat (04)
> Ingvar Johansson
>
>
>
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> (05)
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