 Somewhat more explicit is Aulus Gellius’s (2nd century CE) Attic Nights (XVIII.ii.10), “When I lie and say I am lying, am I lying or speaking the truth?” But Gellius was not widely read in the Middle Ages, and no known medieval author cites him in the context of  insolubles.[4]  Again, Cicero’s Academica priora, II.xxix.95–xxx.97, contains a fairly clear formulation: