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

THE LOGICAL PROPOSITION. 65
hence SiP, "Some great generals are found amongst Eng
lishmen."
"
(6) Old things are not therefore the best."
This means that old things are not the best merely be
cause they are old ; they may be undesirable for other
reasons. This last statement, on the other hand, need not
to all "old
apply
() Old things
things."
(6) the best simply because they are old ;
(c) denied of part of the subject.
Hence SoP, "Some old things are not the best .
(7)
" One
. ."
bad general is better than two good ones."
(a) one bad general acting alone
better than two (>)
good ones failing to act together ;
(c) affirmed of every instance of the subject.
"
In every instance, one bad general ... is
Hence SaP,
better than two good ones .
. ."
(8) "All that act honourably shall not be forgotten."
This cannot be considered ambiguous ; it is evidently
SeP,
"
be forgotten."
None who act honourably are among those who shall
"Not all your endeavours will succeed." Here "all"
serves rather to emphasise "endeavours" than to indicate
quantity, and the proposition is SeP,
" None of your en
deavours will succeed."
U
A11 that glitters is not gold." This is an instance of
the ambiguous use of to which we have "all," referred.
"
The primary implication of the proposition is,
that glitter are not gold," and the secondary,
that glitter are gold."
"
some things
some things
(9) The logical subject may consist of a name qualified
by one or more sentences. In the following, the logical
subject includes all the italicised words : "No one is free
who zs enslaved by his own desires" (SeP) ; "all the officers
who are quartered here are skilled in peaceful pursuits"
(SaP).
(io)"Fine feathers do not make fine birds." Here the
contrast is between having
"
fine
"
feathers and being
"
fine bird ; what is denied is that the two facts are neces
sarily connected (sec p. 57).
E
"
a