Defeaters in Epistemology The concept of epistemic defeat or defeasibility has come to occupy an important place in contemporary epistemology, especially in relation to the closely allied concepts of justified belief, warrant, and knowledge. These allied concepts signify positive epistemic appraisal or positive epistemic status. As a first approximation, defeasibility refers to a belief’s liability to lose some positive epistemic status, or to having this

The Trinity Christians believe that God is a Trinity of Persons, each omnipotent, omniscient and wholly benevolent, co-equal and fully divine. There are not three gods, however, but one God in three Persons: Father, Son and Holy Spirit. Prima facie, the doctrine more commonly known as the Trinity seems gratuitous: why multiply divine beings beyond necessity—especially since one God is hard enough to believe in?

Introspection Introspection is the process by which someone comes to form beliefs about her own mental states. We might form the belief that someone else is happy on the basis of perception – for example, by perceiving her behavior. But a person typically does not have to observe her own behavior in order to determine whether she is happy. Rather, one makes this determination by

Aristotle: Motion Aristotle’s account of motion and its place in nature can be found in the Physics. By motion, Aristotle (384-322 B.C.E.) understands any kind of change. He defines motion as the actuality of a potentiality. Initially, Aristotle’s definition seems to involve a contradiction. However, commentators on the works of Aristotle, such as St. Thomas Aquinas, maintain that this is the only way to define motion. In order

Objects of Perception The objects of perception are the entities we attend to when we perceive the world. Perception lies at the root of all our empirical knowledge. We may have acquired much of what we know about the world through testimony, but originally such knowledge relies on the world having been perceived by others or ourselves using our five senses: sight, hearing, touch, taste,