The Commens Dictionary
Quote from ‘Letters to Paul Carus’
…the essential character of induction is that it infers a would-be from actual singulars. These singulars must, in general, be finite in multitude and then […] the inductive conclusion can be (usually) but indefinite, and can never be certain…
‘Induction’ (pub. 06.09.15-18:42). 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-letters-paul-carus-9.