[36]
Theodorus agrees with them,
for he holds that the question is either as to whether
such and such a thing is really so, or is concerned
with the accidents of something which is an admitted
fact: that is to say it is either περὶ οὐσίας or
περὶ συμβεβηκότων For in all these cases the first
basis is conjectural, while the second belongs to one
of the other classes. As for these other classes of
basis, Apollodorus holds that there are two, one concerned with quality and the other with the names of
things, that is to say a definitive basis. Theodorus
makes them four, concerned with existence, quality,
quantity and relation.
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