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IDEA (Gr. Ibia, connected with i&eiv,...

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Originally appearing in Volume V14, Page 281 of the 1911 Encyclopedia Britannica.
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IDEA (Gr. Ibia, connected with i&eiv, to see; cf. See also:Lat. See also:species from specere, to look at)  , a See also:term used both popularly and in philosophical terminology with the See also:general sense of " See also:mental picture." To have no See also:idea how a thing happened is to be without a mental picture of an occurrence . In this general sense it is synonymous with concept (q.v.) in its popular usage . In See also:philosophy the term " idea " is See also:common to all See also:languages and periods, but there is scarcely any term which has been used with so many different shades of meaning . See also:Plato used it in the See also:sphere of See also:metaphysics for the eternally existing reality, th( archetype, of which the See also:objects of sense are more or less imperfect copies . Chairs may be of different forms, sizes, See also:colours and so forth, but " laid up in the mind of See also:God " there is the one permanent idea or type, of which the many See also:physical chairs are derived with various degrees of imperfection . From this See also:doctrine it follows that these ideas are the See also:sole reality (see further See also:IDEALISM) ; in opposition to it are the empirical thinkers of all See also:time who find reality in particular physical objects (see See also:HYLozoISM, See also:EMPIRICISM, &c.) . In striking contrast to Plato's use is that of See also:John See also:Locke, who defines " idea "- as " whatever is the See also:object of understanding when a See also:man thinks " (See also:Essay on the Human Understanding (I.), vi . 8) . Here the term is applied not to the mental See also:process, but to anything whether physical or intellectual which is the object of it . See also:Hume differs from Locke by limiting " idea " to the more or less vague mental reconstructions of perceptions, the perceptual process being described as an " impression." See also:Wundt widens the term to include " conscious See also:representation of some object or process of the See also:external See also:world." In so doing he includes not only ideas of memory and See also:imagination, but also perceptual processes, whereas other psychologists confine the term to the first two See also:groups . G . F .

Stout and J . M . See also:

Baldwin, in the See also:Dictionary of Philosophy and See also:Psychology, i . 498, define " idea " as " the See also:reproduction with a more or less adequate See also:image, of an object not actually See also:present to the senses." They point out that an idea and a See also:perception are by various authorities contrasted in various or in any of the newer forms which seek for the ultimate essence ways . " Difference in degree of intensity," " See also:comparative of both mind and See also:matter in some unknown force or See also:energy which, See also:absence of bodily See also:movement on the See also:part of the subject," " See also:corn- while in itself it is neither, yet contains the potentiality of both. parative dependence on mental activity," are suggested by It is true that in some See also:modern developments of idealism the psychologists as characteristic of an idea as compared with a ultimate reality is conceived of in an impersonal way, but it is perception. usually added that this ultimate or See also:absolute being is not some- It should be observed that an idea, in the narrower and thing See also:lower but higher than self-conscious See also:personality, including generally accepted sense of a mental reproduction, is frequently it as a more fully See also:developed See also:form may be said to include a more composite . That is, as in the example given above of the idea elementary . of See also:chair, a See also:great many objects, differing materially in detail, 2 . Origin and Development of Idealism.—In its self-conscious all See also:call a single idea . When a man, for example, has obtained form idealism is a modern doctrine . In it the self or subject an idea of chairs in general by comparison with which he can may be said to have come to its rights . This was possible in say " This is a chair, that is a See also:stool," he has what is known any See also:complete sense only after the introspective movement as an " abstract idea " distinct from the reproduction in his represented by the See also:middle ages had done its See also:work, and the mind of any particular chair (see See also:ABSTRACTION) . Furthermore thought of the individual mind and will as possessed of relative a complex idea may not have any corresponding physical See also:independence had worked itself out into some degree of clearness. object, though its particular constituent elements may severally In this respect See also:Descartes' dictum—cogito ergo sum—may be be the reproductions of actual perceptions .

Thus the idea of said to have struck the keynote of modern philosophy, and all a centaur is a complex mental picture composed of the subsequent See also:

speculation to have been merely a prolonged corn-ideas of man and See also:horse, that of a mermaid of a woman and a mentary upon it . While in its completer form it is thus a See also:fish. doctrine distinctive of modern times, idealism has its roots far See PSYCHOLOGY. back in the See also:history of thought .

End of Article: IDEA (Gr. Ibia, connected with i&eiv, to see; cf. Lat. species from specere, to look at)
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1ST STAFFORD HENRY NORTHCOTE IDDESLEIGH
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