premise: Aristotle spent time in Athens.
hypothesis: Aristotle ( [ ˈærɪˌstɒtəl ] Ἀριστοτέλης , [ aristotélɛːs ] , Aristotélēs ; 384 -- 322 BC ) was an ancient Greek philosopher and scientist born in the city of Stagira , Chalkidice , on the northern periphery of Classical Greece . At seventeen or eighteen years of age , he joined Plato 's Academy in Athens and remained there until the age of thirty-seven ( c. 347 BC ) . Shortly after Plato died , Aristotle left Athens and , at the request of Philip II of Macedon , tutored Alexander the Great beginning in 343 BC .