LOGIC (MS 339-1009)
An attempt to devise a plan for the improvement of reasoning, beginning with the distinction between weak arguments and unsound ones. All sound arguments are either necessary or probable. Necessary reasoning is deductive; probable reasoning can be either inductive or retroductive.
Argument, Deduction, Logic (modal see Modality), Probability and Chance, Reasoning (probable see also Probability), necessary Reasoning
pp. 1-11, incomplete
LOGIC / MISCELLANEOUS 1869- 1913