Not all features of a car contribute to efficient transportationsome
features are added for esthetic or other reasons. But as long
as a feature is added because it exhibits certain propertiessuch
as appeal to the esthetic preferences of potential customersit
may be explained teleologically. Nevertheless, there may be features
in a car, a knife, or any other man-made object that need not
be explained teleologically.
That knives have handles may be explained teleologically, but
the fact that a particular handle is made of pine rather than
oak might simply be due to the availability of material. Similarly,
not all features of organisms have teleological explanations.
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