an with long hair can fail to be a poet;
(3) Amos Judd has never been in prison;
(4) Our cook's 'cousins' all love cold mutton;
(5) None but policemen on this beat are poets;
(6) None but her 'cousins' ever sup with our cook;
(7) Men with short hair have all been in prison."
Univ. "men"; a = Amos Judd; b = cousins of our cook; c = having
been in prison; d = long-haired; e = loving cold mutton;
h = poets; k = policemen on this beat; l = supping with our cook
pg089
We now have to put the proposed Premisses into _subscript_ form.
Let us begin by putting them into _abstract_ form. The result is
(1) "All k are l;
(2) No d are h';
(3) All a are c';
(4) All b are e;
(5) No k' are h;
(6) No b' are l;
(7) All d' are c."
And it is now easy to put them into _subscript_ form, as
follows:--
(1) k_{1}l'_{0}
(2) dh'_{0}
(3) a_{1}c_{0}
(4) b_{1}e'_{0}
(5) k'h_{0}
(6) b'l_{0}
(7) d'_{1}c'_{0}
We now have to find a pair of Premisses which will yield a
Conclusion. Let us begin with No. (1), and look down the list,
till we come to one which we can take along with it, so as to
form Premisses belonging to Fig. I. We find that No. (5) will
do, since we can take k as our Eliminand. So our first syllogism
is
(1) k_{1}l'_{0}
(5) k'h_{0}
.'. l'h_{0} ... (8)
We must now begin again with l'h_{0} and find a Premiss to go
along with it. We find that No. (2) will do, h being our
Eliminand. So our next Syllogism is
(8) l'h_{0}
(2) dh'_{0}
.'. l'd_{0} ... (9)
We have now used up Nos. (1), (5), and (2), and must search
among the others for a partner for l'd_{0}. We find that No. (6)
will do. So we write
(9) l'd_{0}
(6) b'l_{0}
.'. db'_{0} ... (10)
Now what can we take along with db'_{0}? No. (4) will do.
(10) db'_{0}
(4) b_{1}e'_{0}
.'. de'_{0} ... (11)
pg090
Along with this we may take No. (7).
(11) de'_{0}
(7) d'_{1}c'_{0}
.'. c'e'_{0} ... (12)
And along with this we may take No. (3).
|