Mnason of Phocis was the son of Mnaseas, who took command of the Phokian army after the death of Phayllus. Mnason was a student of Aristotle

Aristotle

Aristotle was a Greek philosopher and polymath, a student of Plato and teacher of Alexander the Great. His writings cover many subjects, including physics, metaphysics, poetry, theater, music, logic, rhetoric, linguistics, politics, government, ethics, biology, and zoology...

. Mnason was infamous for the large number of slaves he kept.

There is an apocryphal story Aristotle aggressively questioning Plato

Plato

Plato , was a Classical Greek philosopher, mathematician, student of Socrates, writer of philosophical dialogues, and founder of the Academy in Athens, the first institution of higher learning in the Western world. Along with his mentor, Socrates, and his student, Aristotle, Plato helped to lay the...

in his old age, at which of Mnason is mentioned as being in attendance.