The Commens Dictionary

Quote from ‘One, Two, Three: Fundamental Categories of Thought and of Nature’


One very important triad is this: it has been found that there are three kinds of signs which are all indispensable in all reasoning; the first is the diagrammatic sign or icon, which exhibits a similarity or analogy to the subject of discourse; the second is the index, which like a pronoun demonstrative or relative, forces the attention to the particular object intended without describing it; the third is the general name or description which signifies its object by means of an association of ideas or habitual connection between the name and the character signified.

W 5:243
‘Icon’ (pub. 19.08.13-14:36). Quote in M. Bergman & S. Paavola (Eds.), The Commens Dictionary: Peirce's Terms in His Own Words. New Edition. Retrieved from
Aug 19, 2013, 14:36 by Sami Paavola
Last revised: 
Oct 21, 2015, 11:01 by Mats Bergman