Peirce conceived of methodology, or methodeutic, as he preferred to call it, as one of the three major parts of logic taken broadly--the other two being the theory of signs and formal logic. Unlike these two, however, his theory of methodology remained mostly programmatic, and there is little more than fragmentary suggestions about it scattered through his writings. But by gathering them together and pursuing their insights, it is possible to indicate how he might have divided and developed it: 1) (...) The nature of scientific discourse and how it differs from non-scientific. 2) The logic of inquiry, both heuristic and systematic, according to the modes of argument as deductive, inductive, or abductive (i.e. hypothesis) or a combination or all three. 3) The assurance of science considered in the factors that thwart or promote inquiry. (shrink)