Epistemology

Epistemology, from the Greek words episteme (knowledge) and logos (word/speech) is the branch of philosophy that deals with the nature, origin and scope of knowledge. It has historically been one of the most investigated and most debated of all philosophical discourses.

Epistemological theories

It is common for epistemological theories to avoid skepticism by adopting a foundationalist approach. To do this, they argue that certain types of statements have a special epistemological status — that of not needing to be justified. So it is possible to classify epistemological theories according to the type of statement that each argues has this special status.

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Rationalism

Rationalists believe that there are a priori or innate ideas that are not derived from sense experience. These ideas, however, may be justified by experience. These ideas may in some way derive from the structure of the human mind, or they may exist independently of the mind. If they exist independently, they may be understood by a human mind once it reaches a necessary degree of sophistication.

Related Topics:
Rationalists - A priori - Innate ideas - Sense experience - Mind

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The epitome of the rationalist view is Descartes' I think therefore I am, in which the skeptic is invited to consider that the mere fact that he doubts this claim implies that there is a doubter. Because doubting is a kind of thinking, the claim must be correct. Spinoza derived a rationalist system in which there is only one substance, God. Leibniz derived a system in which there are an infinite number of substances, his Monads.

Related Topics:
Descartes - I think therefore I am - Spinoza - God - Leibniz - Monads

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Empiricism

Empiricists claim knowledge is a product of human experience. Statements of observations take pride of place in empiricist theory. Naïve empiricism holds simply that our ideas and theories need to be tested against reality, and accepted or rejected on the basis of how well they correspond to observed facts. The central problem for epistemology then becomes explaining this correspondence.

Related Topics:
Empiricists - Experience - Naïve empiricism - Reality - Correspondence

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Empiricism is associated with science. While there can be little doubt about the effectiveness of science, there is much philosophical debate about how and why science works. The Scientific Method was once favoured as the reason for scientific success, but recently difficulties in the philosophy of science have led to a rise in Coherentism.

Related Topics:
Science - Scientific Method - Philosophy of science - Coherentism

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Empiricism is sometimes associated with a tradition called Logical empiricism, or positivism, which places higher emphasis on ideas about reality rather than on experiences of reality.

Related Topics:
Empiricism - Logical empiricism - Positivism

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Naïve realism

Naïve realism, or Common-Sense realism is the belief that there is a real external world, and that our perceptions are caused directly by that world. It has its foundation in causation in that an object being there causes us to see it. Thus, it follows, the world remains as it is when it is perceived - when it is not being perceived - a room is still there once we exit. The opposite theory to this is solipsism. Naïve realism fails to take into account the psychology of perception. (See: G.E. Moore.)

Related Topics:
Naïve realism - Causation - Solipsism - Perception - G.E. Moore

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Representationalism

Representationalism or Representative realism, unlike Naïve Realism, proposes that we cannot see the external world directly, but only through our perceptual representations of it. In other words, the objects and the world that you see around you are not the world itself, but merely an internal virtual-reality replica of that world. The so-called veil of perception removes the real world from our direct inspection.

Related Topics:
Representationalism - Representative realism - Veil of perception

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Idealism

Idealism holds that what we refer to and perceive as the external world is in some way an artifice of the mind. Analytic statements (for example, mathematical truths), are held to be true without reference to the external world, and these are taken to be exemplary knowledge statements. George Berkeley, Immanuel Kant and Georg Hegel held various idealist views. Idealism is itself a metaphysical thesis, but has important epistemological consequences.

Related Topics:
Idealism - George Berkeley - Immanuel Kant - Georg Hegel - Metaphysical

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Phenomenalism

Phenomenalism is a development from George Berkeley's claim that to be is to be perceived. According to phenomenalism, when you see a tree, you see a certain perception of a brown shape, when you touch it, you get a perception of pressure against your palm. On this view, one shouldn't think of objects as distinct substances, which interact with our senses so that we may perceive them; rather we should conclude that all that really exists is the perception itself.

Related Topics:
Phenomenalism - George Berkeley

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Pragmatism

Pragmatism about knowledge holds that what is important about knowledge is that it solves certain problems that are constrained both by the world and by human purposes. The place of knowledge in human activity is to resolve the problems that arise in conflicts between belief and action. Pragmatists are also typically committed to the use of the experimental method in all forms of inquiry, a non-skeptical fallibilism about our current store of knowledge, and the importance of knowledge proving itself through future testing.

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