There are some too who make
questions of identity
come under the
head of quality,
others who place it under the head
divides them into two
classes, those concerned with words
and those concerned with things.
In the first case he thinks that
the question is whether a word has any meaning; if
so, what is its meaning, how many meanings has it,
and how does it come to mean what it means? In
the latter case, we employ conjecture,
which he calls
or inference from perception, quality,
which he calls κατ᾽ ἔννοιαν,
or rational inference, and relation.
Hence also comes the division
into things written and unwritten.