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

IMMEDIATE INFERENCE. 83
Hence SaP, "All mercy which pardons those that kill is
murderous."
Converse PiS,
pardons
. . ."
"
Something murderous is mercy which
(4) Non omnis mortar ["I shall not all die "].
(a) Myself;
(b) immortality ;
(c) affirmed of part of the subject.
"
Hence SiP, Some part of me is immortal."
"
Converse PiS, Something immortal is part of me."
The original proposition has a secondary implication,
" Some part of me is not immortal," which is formally
"
inconvertible unless we it express in the form, Some part
of me is mortal."
(5) "Tis cruelty to load a falling man."
(rt) To load a falling man ;
(b) a cruel thing ;
(c} affirmed of every instance of the subject.
"
In every case to load a falling man is a
Hence SaP,
cruel thing."
Converse PiS, "Something cruel is to load .
(6)
" We cannot all command success."
(a) We;
(b) able to command success ;
. ."
(<:) denied of the subject in some cases.
Some Hence SoP,
"
" Some of us are un
of us are not able . . ." Formally
inconvertible, unless we change it into,
able." The original proposition has a secondary implication
SiP, "Some of us are able to command success," with con
beings able to command success are ourselves."
"
verse, Some
(7)
"
In man there is nothing great but mind."
This is a compound proposition (exclusive), and may be
resolved into,
( (i) nothing that is not mind is great in man ;
( (2) mind is great in man.
In the first proposition,
(a) what is not mind ;
(b) a thing great in man ;
(c) denied of the whole subject.
"
Hence SeP, with converse PeS, nothing great in man
is other than mind."