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Roger L. Costello scripsit:
> 2. Is kilometer a function? e.g., kilometer(Yangtze) --> 6300
> In general: kilometer(physical object) --> number
> "The kilometer function maps a physical object to a number."
I think this view is the most nearly correct, but it needs amplification:
it doesn't capture that it's the *length* (rather than, say, the
average depth) of the Yangzi that is 6300 km. So we can rewrite it
in terms of relations as follows:
Yangzi length X
X kilometer 6300
where "kilometer" is a relation that maps a length (an abstract property
of a physical object) into a pure number.
--
Where the wombat has walked, John Cowan <jcowan@reutershealth.com>
it will inevitably walk again. http://www.ccil.org/~cowan
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