How was G.E. Moore a realist?
Moore was at times a naive realist and at other times a representative realist. All realists believe that there is a real, external world. Naïve realists hold that we directly perceive objects in this world. Representative realists think that what we perceive are the effects of those objects on our organs of sense, or, in other words, that what we perceive are not objects but sense data caused by real objects.