The Commens Dictionary
Quote from ‘Syllabus: Syllabus of a course of Lectures at the Lowell Institute beginning 1903, Nov. 23. On Some Topics of Logic’
Separation of Thirdness, or Tertial Separation, called discrimination, consists in representing one of the two separands without representing the other. If A can be prescinded from, i.e. supposed without B, then B can, at least, be discriminated from A.