Jerry, JFS
In his late writings on the logic of pragmatism, he emphasized the multiple cycles of observations, induction, abduction, deduction, testing (actions) and repeat.
JLRC> Do you have specific citations? I wish that Peirce had used the word 'cycle' and had drawn a diagram similar to the one I frequently use. See the attached soup1.jpg. I pieced together passages from many of Peirce's writings about induction, abduction, and deduction to construct that cycle. There are many such comments scattered all through his writings. (His lectures on pragmatism in EP vol. 2 contain many of them.) Following is a passage (CP 5.171) that mentions all four arrows of the cycle: abduction, deduction, testing (action), and induction:
Abduction merely suggests that something may be. Its only justification is that from its suggestion deduction can draw a prediction which can be tested by induction, and that, if we are ever to learn anything or to understand phenomena at all, it must be by abduction that this is to be brought about.
See Section 7, pp. 26 to 34, of http://jfsowa.com/pubs/signproc.pdf . Diagram 7 (p. 31) is soup1.jpg. On page 32, I use that diagram to explain Peirce's point "truth can be nothing more nor less than the last result to which the following out of this method would ultimately carry us." (EP 2.379-380) That passage implies a cycle. Peirce's lectures on pragmatism would have been much clearer if he had drawn such a cycle. John
----------------------------- PEIRCE-L subscribers: Click on "Reply List" or "Reply All" to REPLY ON PEIRCE-L to this message. PEIRCE-L posts should go to peirce-L@list.iupui.edu . To UNSUBSCRIBE, send a message not to PEIRCE-L but to l...@list.iupui.edu with the line "UNSubscribe PEIRCE-L" in the BODY of the message. More at http://www.cspeirce.com/peirce-l/peirce-l.htm .
