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Fact

1893 | Book II. Division I. Part 2. Logic of Relatives. Chapter XII. The Algebra of Relatives | MS [R] 418:354

A fact is an element of truth expressible as a proposition.

1903 | Syllabus: Syllabus of a course of Lectures at the Lowell Institute beginning 1903, Nov. 23. On Some Topics of Logic | EP 2:270-271

Among the familiar ideas of logic in which the element of Secondness is predominant, may be mentioned, in the first place, the conception of a *fact*. The easiest definition of a Fact is that it is an abstract element of the real, corresponding to a proposition. But this needlessly introduces the element of Thirdness; but it can be prescinded from it. … A Fact may be defined as the Secondness which consists between anything and a possibility, or Firstness, realized in that thing.