What Problem Did Ladd-Franklin (Think She) Solve(d)?

Christine Ladd-Franklin is often hailed as a guiding star in the history of women logic—not only did she study under C. S. Peirce and was one first to receive PhD from Johns Hopkins, also, according many modern commentators, solved logical problem which had plagued field syllogisms since Aristotle. In this paper, we revisit claim, posing answering two distinct questions: Which solve her thesis, think solved? We show that neither case answer “a long-standing due Aristotle.” Instead, what Jevons articulated nineteenth century.