No More Learning

Others says that Nicander of Colophon was a contemporary of Aratus and Antigonus; that Aratus did not know anything about astronomy and Nicander did not know anything about medicine, but nevertheless Antigonus commanded Aratus, who was a doctor, to write the Phaenomena and Nicander, who was an astronomer, to write the           and Alexipharmaca; and that therefore both of them made mistakes in the technical details of their subjects.