socrates focused on knowledge; he had an awareness of one's own ignorance, dialect/dialogs: cooperative argumentation to stimulate critical thinking (Socratic seminar is), virtue which focused on self development not accumulation of possessions (non-materialistic). Play-Doh focused on innate knowledge and nature, the theory of forms which was non-physical essences of all things (we know what a chair looks like without having to look at it), cave allegory (ignorance and quest for knowledge, illusions versus reality). The third is Aristotle who focused on monism which was a belief based on observation and logic, power of reason, persuasion techniques (ethos, pathos, and logos)