There are in fact two things, science and opinion; the former begets knowledge, the latter ignorance.
Authentication Score 2
Original Citation
Hippocrates. The Law. c. 4th century BC, pt. 4.
Current Citation
Hippocrates. "Canon." Hippocratic Writings, translated by J. Chadwick and W. N. Mann, et al. Penguin Classics, 1984.