David W. Hamlyn
Hamlyn's major interests were in Aristotle (whose de Anima, II and III and parts of I, he translated with a commentary, 1968) and in Ludwig Wittgenstein, both of whom influenced Hamlyn's approach to questions in epistemology and philosophy of psychology.
Hamlyn's central thesis, developed in Experience and the Growth of Understanding (1978), Perception, Learning and the Self (1983), and In and Out of the Black Box (1990), was that in order to be a knower a being must be active and seek to regulate its beliefs in accord with a norm of truth: this requires membership of a community, interaction with which involves emotional responses. In short, knowers are social, affective agents.
Over the course of his career, Hamlyn authored twelve books.