Epistemologists

Epistemology i/ɨˌpɪstɨˈmɒlədʒi/ (from Greek ἐπιστήμη (epistēmē), meaning "knowledge, understanding", and λόγος (logos), meaning "study of") is the branch of philosophy concerned with the nature and scope of knowledge. It questions what knowledge is, how it is acquired, and to what extent it is possible for a given subject or entity to be known.