  Socrates then turns to consider, and reject, three attempts to spell out what a logos is—to give an account of “account.”  The first attempt takes logos just to mean “speech” or “statement” (206c–e). The second account (206e4–208b12) of “logos of O” takes it as “enumeration of the elements of O.” The third and last proposal (208c1–210a9) is that to give the logos of O is to cite the sêmeion or diaphora of O, the “sign” or diagnostic feature wherein O differs from everything else.