The Commens Dictionary

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


We come to […] the argument. [—] It will therefore be divided into three species according as this representation is a likeness, index, or symbol.

These three species are the same as Hypothesis, Induction, and Deduction. Hypothesis brings up to the mind an image of the true qualities of a thing - it therefore informs us as to comprehension but not as to Extension, that is it represents a representation which has Comprehension without Extension; in other words it represents a likeness.

W 1:485
‘Hypothesis [as a form of reasoning]’ (pub. 02.02.13-17:27). Quote in M. Bergman & S. Paavola (Eds.), The Commens Dictionary: Peirce's Terms in His Own Words. New Edition. Retrieved from
Feb 02, 2013, 17:27 by Sami Paavola
Last revised: 
Jan 07, 2014, 01:00 by Commens Admin