An introductory text-book of logic - Mellone, Sydney - Rare Books at ...

THE CATEGORIES OR PREDICAMENTS. 193
grammatical; they represent the various kinds of
predicable existence. They should properly
be called
"
Predicables," but long usage has fixed the application
of this term to the logical relations explained above ( i).
EXERCISE XIV.
We add some general questions on the subjects dealt with
in this chapter.
(1) What difficulties attend the process of defining the
names of material substances, of sensations and emotions,
and how may they be overcome? Illustrate your answer by
examples. [O.]
(2) Show that Division belongs to Applied Logic [or,
Material Logic], and can have no place in a purely formal
system. [O.]
(3) How far are the rules of logical Division of use in
actual science ? [L.] Or
What is Scientific Classification ? What are the chief
difficulties that attend it ? [O.]
(4) In what respects is Aristotle s classification of the
Predicables superior to the ordinary one? How may we
suppose that each was arrived at? [O.] Or
Criticise (i) the Predicables and (2) the Categories (or
Predicaments) as examples of classification. [O.]
(5) "The Categories originally belong to grammar rather
than to Logic." How may they be given an intelligible
place in a system of Logic ? [O.]
NOTE.
"REAL KINDS."
We have referred to the ancient view that in Nature there
are fixed, permanent kinds or classes of things which can
never pass into one another : and hence a classification
which corresponded to these divisions was called
"
for it was taken to be
natural,
a recognition of ready-made kinds
or classes, given to us in Nature. This view prevailed in
ancient science, and is supported by J. S. Mill. The
N