Charles Sanders Peirce Quotes
It is important to understand what I mean by semiosis. All dynamic action, or action of brute force, physical or psychical, either takes place between two subjects, whether they react equally upon each other, or one is agent and the other patient, entirely or partially, or at any rate is a resultant of such actions between pairs. But by "semiosis" I mean, on the contrary, an action, or influence, which is, or involves, a cooperation of three subjects, such as a sign, its object, and its interpretant, this tri-relative influence not being in any way resolvable into actions between pairs.
Peirce, Charles Sanders. Collected Papers of Charles Sanders Peirce, Volume 5: Pragmatism and Pragmaticism. Edited by Charles Hartshorne and Paul Weiss, Harvard University Press, 1934, p. 335.
Charles Sanders Peirce was an American philosopher, logician, mathematician and scientist who is sometimes known as "the father of pragmatism".