I am still back on Diogenes Laertius, Lives and Opinions of Eminent Philosophers,
and found this eyebrow raising qoute in Wikipedia:
QuoteHe is criticized primarily for being overly concerned with superficial details of the philosophers' lives and lacking the intellectual capacity to explore their actual philosophical works with any penetration. However, according to statements of the 14th-century monk Walter Burley in his De vita et moribus philosophorum, the text of Diogenes seems to have been much fuller than that which we now possess.
Do we know what Burley said specifically?