A. MS., G-undated-13 [1905-06?], pp. 1-47, with 10 pp. of variants.
Published, in part, as 7.77-78 (pp. 20-29). Unpublished: the place of logic among the sciences; the fact that logic is a theoretical, not practical, science, even in respect to its methodeutic division (pp. 1-19). The relationship between logic and psychology, with CSP’s opposition to the “psychological logicians” stated at some length (pp. 30-47).
The entry in BibTeX format.
Logic, – I do not mean to define, but only to characterize it, – is supposed to be a science which investigates the principles upon which we are to decide whether any given argument makes its pretensions good or not.
…“rational” means essentially self-criticizing, self-controlling and self-controlled, and therefore open to incessant question.