As part of my first foray into video-blogging, I re-visit some of the basic ideas I tried to express in an earlier post titled psychology’s neglect of philosophy. In some ways this is an introduction to the philosophy of science (in the tradition of Kuhn and Popper), or more specifically, the philosophy of psychology. While psychology works hard to present itself as a scientific discipline, it seems to me that in its attempts to fully embrace empirical reductionism and materialism, it often minimizes critical thinking and succumbs to scientism. I explain how the larger field of psychology is made up of disparate conceptual communities who subscribe to their preferred theories, jargon, and literature. These preferred ideas are often taken as true and seldom questioned – each community insists that they have uncovered the ‘truth’ about what it means to be human. However, it is important to recognize that our rationally-constructed theories are what organize, explain, and ultimately justify what we want to call ‘evidence.’ Careful reasoning (e.g. critical thinking and a developed capacity for philosophical argumentation) will better ensure that we do not fall into the trap of scientism.