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Commens
Digital Companion to C. S. Peirce
‘Induction’ (pub. 03.02.13-19:49). 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-letter-j-h-kehler-2.
Term: 
Induction
Quote: 

… An Induction can hardly be sound or at least is to be suspected usually, unless it has been preceded by a Retroductive reasoning to the same general effect. Induction chiefly serves to render more certain ideas that have already been otherwise suggested. I use “Induction” in a wider sense than usual. It is usually regarded as a reasoning by which one passes from asserting something of a number of single things to asserting the same of the whole class to which those things belong. I give the definition a somewhat different turn, at least, and throw much light upon Induction by defining it as any reasoning from a sample to the whole sampled.

Source: 
Peirce, C. S. (1911). Letter to J. H. Kehler. L [R] 231.
References: 
NEM 3:178
Date of Quote: 
1911
URL: 

http://www.commens.org/dictionary/entry/quote-letter-j-h-kehler-2