(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}
(1) k_{1}l'_{0}
(5) k'h_{0}
.'. l'h_{0} ... (8)
(8) l'h_{0}
(2) dh'_{0}
.'. l'd_{0} ... (9)
(9) l'd_{0}
(6) b'l_{0}
.'. db'_{0} ... (10)
(10) db'_{0}
(4) b_{1}e'_{0}
.'. de'_{0} ... (11)
(11) de'_{0}
(7) d'_{1}c'_{0}
.'. c'e'_{0} ... (12)
(12) c'e'_{0}
(3) a_{1}c_{0}
.'. a_{1}e'_{0}
Note that, in working a Sorites by this Process, we may begin
with _any_ Premiss we choose.]
pg091
§ 3.
_Solution by Method of Underscoring._
Consider the Pair of Premisses
xm_{0} + ym'_{0}
which yield the Conclusion xy_{0}
We see that, in order to get this Conclusion, we must eliminate m and
m', and write x and y together in one expression.
Now, if we agree to _mark_ m and m' as eliminated, and to read the two
expressions together, as if they were written in one, the two Premisses
will then exactly represent the _Conclusion_, and we need not write it
out separately.
Let us agree to mark the eliminated letters by _underscoring_ them,
putting a _single_ score under the _first_, and a _double_ one under the
_second_.
The two Premisses now become
xm_{0} + ym'_{0}
- =
which we read as "xy_{0}".
In copying out the Premisses for underscoring, it will be convenient to
_omit all subscripts_. As to the "0's" we may always _suppose_ them
written, and, as to the "1's", we are not concerned to know _which_
Terms are asserted to _exist_, except those which appear in the
_Complete_ Conclusion; and for _them_ it will be easy enough to refer to
the original list.
pg092
[I will now go through the process of solving, by this method,
the example worked in § 2.
The Data are
1 2 3 4
k_{1}l'_{0} + dh'_{0} + a_{1}c_{0} + b_{1}e'_{0} +
5 6 7
k'h_{0} + b'l_{0} + d'_{1}c'_{0}
The Reader should take a piece of paper, and write out this
solution for himself. The first line will consist of the above
Data; the second must be composed, bit by bit, according to the
following directions.
We begin by writing down the first Premiss, with its numeral
over it, but omitting the subscripts.
We have now to find a Premiss which can be combined with this,
_i.e._, a Premiss containing either k' or l. The first we find
is No. 5; and this we tack on, with a +.
Public-domain text, read in full here on John Shaqi.
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