The Commens Dictionary
Quote from ‘C.S.P.'s Lowell Lectures of 1903 2nd Draught of 3rd Lecture’
…logic is the science of regulating your thoughts so as not to be surprised when it can be avoided; and therefore whatever is said in logic about the modes of being of qualities, of laws, etc must be understood as regulative truth in Kant’s sense.
MS [R] 462:46
‘Logic’ (pub. 25.11.14-17:33). 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-csps-lowell-lectures-1903-2nd-draught-3rd-lecture-1.