The Commens Dictionary
Quote from ‘Logic. The Theory of Reasoning. Part I. Exact Logic. Introduction. What is Logic’
Logic is the Theory of Reasoning. Its main business is to ascertain the conditions upon which the just strength of reasoning depends.
‘Logic’ (pub. 28.02.18-11:41). Quote in M. Bergman & S. Paavola (Eds.), The Commens Dictionary: Peirce's Terms in His Own Words. New Edition. Retrieved from http://www.commens.org/dictionary/entry/quote-logic-theory-reasoning-part-i-exact-logic-introduction-what-logic.