Y. FRIED, address: 9 Hatzvi Street, Tel Aviv, Israel, phone 03-5743111. Affiliations: Tel Aviv University Medical School. Professional background: Psychiatry. Interest in Popper: general epistemology. Publications: Y Fried and J. Agassi, Paranoia, Reidel, 1976; Y. Fried and J. Agassi, Psychiatry as Medicine, Nighoff, 1983. Activities: Psychiatry, History of Medicine.