“ A pupil of Nessus, or, as some accounts prefer, of Democritus himself, he was a complete sceptic. He accepted the Democritean theory of atoms and void and the plurality of worlds, but held a theory of his own that the stars are formed from day to day by the moisture in the air under the heat of the sun. His radical scepticism is seen in the first sentence of his Περὶ φύσεως, quoted by Cicero in the Academics ii. 23 § 73. He says, “We know nothing, no, not even whether we know or not!" and maintains that everything is to each person only what it appears to him to be. ”

“ Metrodorus of Athens was a philosopher and painter who flourished in the 2nd century B.C. It chanced that Paullus Aemilius, visiting Athens on his return from his victory over Perseus in 168 B.C., asked for a tutor for his children and a painter to glorify his triumph. ”

“ Metrodorus of Stratonice was a pupil, first of Apollodorus, and later of Carneades. He flourished about 110 B.C., and is reputed to have been an orator of great power. His defection from the Epicurean school is almost unique. It is explained by Cicero as being due to his theory that the scepticism of Carneades was merely a means of attacking the Stoics on their own ground. Metrodorus held that Carneades was in reality a loyal follower of Plato. ”