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. The so-called elements of geometrical proofs, and in
general the elements of demonstrations, have a similar character;
for the primary demonstrations, each of which is implied in many
demonstrations, are called elements of demonstrations; and the primary
syllogisms, which have three terms and proceed by means of one middle,
are of this nature.
(2) People also transfer the word 'element' from this meaning
and apply it to that which, being one and small, is useful for many
purposes; for which reason what is small and simple and indivisible is
called an element. Hence come the facts that the most universal things
are elements (because each of them being one and simple is present
in a plurality of things, either in all or in as many as possible),
and that unity and the point are thought by some to be first
principles. Now, since the so-called genera are universal and
indivisible (for there is no definition of them), some say the
genera are elements, and more so than the differentia, because the
genus is more universal; for where the differentia is present, the
genus accompanies it, but where the genus is present, the
differentia is not always so. It is common to all the meanings that
the element of each thing is the first component immanent in each.
4
'Nature' means (1) the genesis of growing things-the meaning which
would be suggested if one were to pronounce the 'u' in phusis long
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