From the Robin Catalogue:
A. MS., n.p., n.d., 27 pp., of which 4 pp. are in Zina Fay Peirce’s hand.
Deduction, induction, and hypothesis as practical considerations. Beware of the syllogism: everything can be explained, with the syllogism merely making our knowledge more distinct. With regard to the ontological argument, every definition implies existence of its object. Random sampling.
Published as W 1:440-454 (“[Lecture VI])