[Inquiry] Re: Logic Of The Sciences

[Jon Awbrey]

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LOTS.  Note 10

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| Chapter 2
|
| As Logic is a classificatory science, the study of it should
| be preceded by the study of the pure laws of classification;
| but as these have never been developed, we must study them as
| we go along.  The science of classification regards matters as
| explained when the class under which they come is stated.  Thus,
| that neat, swine, sheep, and deer are herbivora is explained by
| the fact that all cloven-footed animals are herbivora.  Hence,
| since that which is explained is a result of that which explains
| it, it is proper in classificatory science to regard every species
| as a product of the union of the abstractions which are embodied
| in it.  Then the character of any genus is an abstraction which is
| realized in its species by means of its differences;  and all the
| differences are all the ways in which it is realized.  Hence, if
| we are considering as we always should in pure science, not what
| is but what is possible, the division of a genus into its species,
| is the solution of the problem "how can the abstraction which is the
| character of this genus be realized?"  The character of the genus is
| the Datum and the difference is the Requisitum.  But in general there
| will not be sufficient connection between these taken alone, and it
| will be necessary to add certain Conditions and as these vary so
| will the system of classification vary.
|
| C.S. Peirce, 'Chronological Edition', CE 1, 329-330
|
| C.S. Peirce, "Logic of the Sciences", MS 113 (1865), pp. 322-336 in:
|'Writings of Charles S. Peirce:  A Chronological Edition, Vol. 1, 1857-1866',
| Peirce Edition Project, Indiana University Press, Bloomington, IN, 1982.

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