This geometer is said to have given the first proof that there are exactly five Platonic solids. For 10 points each:
[10h] Name this title character of a work which discusses the maxim “Man is the measure of all things,” which it describes as an “orphan” of Protagoras.
ANSWER: Theaetetus (of Athens)
[10e] Theaetetus discusses and rejects three definitions of this concept, the last of which has been interpreted as expressing the theory that this concept is “justified true belief”. Epistemology is the study of this concept.
ANSWER: knowledge
[10m] That last definition of knowledge uses this Greek term, often translated in that context as “account” or “explanation”. Heraclitus uses this term to mean a principle with which “all things come to be in accordance”.
ANSWER: logos