- Athenian philosopher.
- ?470–399 bc, Athenian philosopher, whose beliefs are known only through the writings of his pupils Plato and Xenophon. He taught that virtue was based on knowledge, which was attained by a dialectical process that took into account many aspects of a stated hypothesis. He was indicted for impiety and corruption of youth (399) and was condemned to death. He refused to flee and died by drinking hemlock
