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. Thus some people do not listen
to a speaker unless he speaks mathematically, others unless he gives
instances, while others expect him to cite a poet as witness. And some
want to have everything done accurately, while others are annoyed by
accuracy, either because they cannot follow the connexion of thought
or because they regard it as pettifoggery. For accuracy has
something of this character, so that as in trade so in argument some
people think it mean. Hence one must be already trained to know how to
take each sort of argument, since it is absurd to seek at the same
time knowledge and the way of attaining knowledge; and it is not
easy to get even one of the two.
The minute accuracy of mathematics is not to be demanded in all
cases, but only in the case of things which have no matter. Hence
method is not that of natural science; for presumably the whole of
nature has matter. Hence we must inquire first what nature is: for
thus we shall also see what natural science treats of (and whether
it belongs to one science or to more to investigate the causes and the
principles of things).
Book III
1
WE must, with a view to the science which we are seeking, first
recount the subjects that should be first discussed. These include
both the other opinions that some have held on the first principles,
and any point besides these that happens to have been overlooked
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