The Commens Dictionary

Quote from ‘Logical Tracts. No. 1. On Existential Graphs’


An informant index is a proposition. For one cannot better define a proposition (as distinguished from the assertion whereby one assumes responsibility for its truth) than as a representation of which one part serves, directly or indirectly, as an index of its object, while the other part excites in the mind an image of the same object.

1903 [c.]
MS [R] 491:5
‘Proposition’ (pub. 13.01.15-11:11). Quote in M. Bergman & S. Paavola (Eds.), The Commens Dictionary: Peirce's Terms in His Own Words. New Edition. Retrieved from
Jan 13, 2015, 11:11 by Mats Bergman