Dr. Fleisher’s primary research concerns the epistemology of inquiry.
For instance, he is interested in what kinds of reasons and values researchers should be sensitive to, and what attitude it is rational to have toward one's favored theory during inquiry. He argues that it is often irrational to believe one's favored theory; instead, the appropriate attitude is on he calls endorsement. He also has a research project involving virtue epistemology and reliabilism. In addition, he is working on projects involving fragmentation of mental states, collective epistemic responsibility, and the epistemology and ethics of data and technology.