Anaxagoras's Theory of Universal Mixture

Anaxagoras said that nothing is so hot that it has no admixture of cold, or vice versa. He instead explains it in the more concrete terms of a physical mixture. With this theory, anaxagoras put on the table a philosophical problem which was going to worry philosophers for many generations to come. We now think that when two things like water and wine get mixed together, what is actually happening is not so much mixture as a very complicated jumbling together.