The Commens Dictionary

Quote from ‘Lowell Lectures on The Logic of Science; or Induction and Hypothesis: Lecture I’


We must begin, however, with the simplest kind of argumentation - that which is called Deductive reasoning - or as we may call it reasoning from preconceived ideas - that which traces out what is implicitly involved in what we already admitted. Few errors are made by any but the most careless reasoners in this kind of argument; and it may seem, therefore, not worth studying but the more difficult kinds of inference cannot possibly be understood without a thorough knowledge of Deduction.

W 1:362
‘Deduction’ (pub. 02.02.13-08:59). Quote in M. Bergman & S. Paavola (Eds.), The Commens Dictionary: Peirce's Terms in His Own Words. New Edition. Retrieved from
Feb 02, 2013, 08:59 by Sami Paavola
Last revised: 
Jan 07, 2014, 01:00 by Commens Admin