The correct answer to this question is epistemological and prototype theory
Gettier contributed to what we know about the epistemological<span> model of truth </span>while Rosch contributed to what we know about the prototype theory model. Eleanor Rosch is a professor of psychology at the University of California, Berkeley while Edmund L. Gettier III is an Professor Emeritus at the University of Massachusetts Amherst<span>. He is also an American Philosopher.</span>