When a pupil, Aristotle, disagrees with his Tutor, Plato.

 Aristotle's immanent realism means his epistemology is based on the study of things that exist or happen in the world, and rises to knowledge of the universal, whereas for Plato epistemology begins with knowledge of universal Forms (or ideas) and descends to knowledge of particular imitations of these.^[

Aristotle uses induction from examples alongside deduction, (a modern day Science approach) whereas Plato relies on deduction from a priori principles