Category Archives: Logic of Relatives

Peirce’s 1870 “Logic of Relatives” • Comment 8.4 I continue with my commentary on CP 3.73, developing the Othello example as a way of illustrating Peirce’s formalism. To familiarize ourselves with the forms of calculation available in Peirce’s notation, let us … Continue reading →

Peirce’s 1870 “Logic of Relatives” • Comment 8.3 I continue with my commentary on CP 3.73, developing the Othello example as a way of illustrating Peirce’s formalism. It is critically important to distinguish a relation from a relative term. The relation … Continue reading →

Peirce’s 1870 “Logic of Relatives” • Comment 8.2 I continue with my commentary on CP 3.73, developing the Othello example as a way of illustrating Peirce’s formalism. In the development of the story so far, we have a universe of discourse … Continue reading →

Peirce’s 1870 “Logic of Relatives” • Comment 8.1 To my way of thinking, CP 3.73 is one of the most remarkable passages in the history of logic.  In this first pass over its deeper contents I won’t be able to accord … Continue reading →

We continue with §3. Application of the Algebraic Signs to Logic. Peirce’s 1870 “Logic of Relatives” • Selection 8 The Signs for Multiplication (cont.) Thus far, we have considered the multiplication of relative terms only.  Since our conception of multiplication … Continue reading →

Peirce’s 1870 “Logic of Relatives” • Proto-Graphical Syntax It is clear from our last Selection that Peirce is already on the verge of a graphical syntax for the logic of relative terms.  Indeed, it is likely he had already reached … Continue reading →