Archelaus (philosopher) Archelaus (philosopher) Archelaus (; ; fl. 5th century BCE) was an Ancient Greek philosopher, a pupil of Anaxagoras, and may have been a teacher of Socrates. He asserted that the principle of motion was the separation of hot from cold, from which he endeavoured to explain the formation of the Earth and the creation of animals and humans. Archelaus was a philosopher of the Ionian School, called "Physicus" from having been the first to teach natural philosophy at Athens. This statement of Diogenes Laërtius, is contradicted by Clement of Alexandria, but the two may be reconciled by supposing that Archelaus
Dexippus (philosopher) Dexippus (philosopher) Dexippus (; fl. 350) was a Greek philosopher, a pupil of the Neoplatonist Iamblichus, belonging to the middle of the 4th century AD. He wrote commentaries on Plato and Aristotle of which one, an explanation and defense of the Aristotelian Categories, is partially extant. In this work Dexippus explains to one Seleucus the Aristotelian Categories, and endeavours at the same time to refute the objections of Plotinus. He also advocated the harmony of the philosophies of Plato and Aristotle. A Latin edition edited by Félicien was published under the title "Quœstionum in Categorias Libri Tres" in 1549. The