The Commens Dictionary
Quote from ‘The First Part of An Apology for Pragmaticism’
In a paper published in the Proceedings of the American Academy of Arts and Sciences for 1867 May 14, I defined the three ways in which an idea can be mentally isolated from another. They [are] Dissociation, Prescission, and Discrimination. [—] Discrimination consists in logically supposing the former idea to be absent though the latter is present. Thus, I can discriminate color from space, since I can logically suppose that there is a space that is uncolored.
‘Discrimination’ (pub. 28.02.18-10:23). Quote in M. Bergman & S. Paavola (Eds.), The Commens Dictionary: Peirce's Terms in His Own Words. New Edition. Retrieved from http://www.commens.org/dictionary/entry/quote-first-part-apology-pragmaticism-2.