Digital Companion to C. S. Peirce
1902 | Pure | CP 2.544
…Pure Logic, a phrase often used, but to which no distinct conception can be attached. [—] Perhaps we may say that pure logic is a logic deduced from hypotheses (which some will look upon as axioms) without any inquiry into the observational warrant for those hypotheses.
‘Pure Logic’. Term 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/term/pure-logic, 20.03.2023.