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Born in County Kikenny, Ireland
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In 1709 he published his first major work "an essay towards a new theory of vision". He discusses the limitations of human vision. His theory was that proper objects of sight are not material objects, but light and color. He believes distance cannot be seen but a line directed end wise to the eye. To further imply he perceived distance that he states intermediate objects such as houses, fields, rivers,etc. That take up considerable space then the object past that is a great distance.
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George Berkeley wrote a book "The Principals of Human Knowledge". I. This book the wrote about ideas of senses are stronger, livelier, and clearer than those of imagination. The senses are also steady, orderly, and coherent. All knowledge comes from perceptions. Berkeley contended that what we recognize is solely ideas. He believed the material substance does not exist. While the spiritual substance does. Berkeley believes only the spirit is active.
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George Berkeley is known for his theory of immaterialism. The theory is that objects only exsist as perception and not as matter. Individuals can only directly know sensations and ideas not the objects themselves. It was his belief that physical objects only exsist if they are perceived by the mind of the individual, anything outside the mind is unjustified. In Berkeley's mind when you don't see something it isn't there.
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https://youtu.be/9iBryNYU49Y The above is a video about Immateralism.
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Died in Oxford, Great Britian