ONT De In Esse Predication
o~~~~~~~~~o~~~~~~~~~o~~~~~~~~~o~~~~~~~~~o~~~~~~~~~o
DEIP. Note 1
o~~~~~~~~~o~~~~~~~~~o~~~~~~~~~o~~~~~~~~~o~~~~~~~~~o
| [A Boolian Algebra With One Constant]
|
| Every logical notation hitherto proposed has an unnecessary number of signs.
| Is is by means of this excess that the calculus is rendered easy to use and
| that a symmetrical development of the subject is rendered possible; at the
| same time, the number of primary formulae is thus greatly multiplied, those
| signifying facts of logic being very few in comparison with those which
| merely define the notation. I have thought that it might be curious to
| see the notation in which the number of signs should be reduced to a
| minimum; and with this view I have constructed the following. The
| apparatus of the Boolian calculus consists of the signs, =, > (not
| used by Boole, but necessary to express particular propositions),
| +, -, x [·], 1, 0. In place of these seven signs, I propose to
| use a single one.
|
| C.S. Peirce, CP 4.12, untitled paper circa 1880.
o~~~~~~~~~o~~~~~~~~~o~~~~~~~~~o~~~~~~~~~o~~~~~~~~~o