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. Dissociation consists in imagining a case into which the former idea enters without the other.