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A Brief Disappearing Act

5/30/2014

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George Berkeley ... is important in philosophy through his denial of the existence of matter—a denial which he supported by a number of ingenious arguments. He maintained that material objects only exist through being perceived. To the objection that, in that case, a tree, for instance, would cease to exist if no one was looking at it, he replied that God always perceives everything; if there were no God, what we take to be material objects would have a jerky life, suddenly leaping into being when we look at them; but as it is, owing to God’s perceptions, trees and rocks and stones have an existence as continuous as common sense supposes. This is, in his opinion, a weighty argument for the existence of God.
                                                          —Bertrand Russell, in A History of Western Philosophy (1945)


When discussing how Berkeley's philosophy appeared to be self-evidently false, but impossible to refute, Dr. Johnson kicked out at a nearby stone, exclaiming "I refute it thus!"

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How utterly absurd. I could reiterate my point from last week that philosophers sometimes go to extreme ends when trying to hold on to a single idea and avoid the cognitive dissonance that arises from that, or I could elaborate on the point that after Descartes dualism was rejected by Spinoza's monism it was sort of inevitable that someone would come down on the side of "no, everything is immaterial," but it's a beautiful Friday and I am going outside to soak in the pleasures of the physical world that I find myself in and for which I've been evolved to enjoy. Let's therefore make this quick so we can turn our attention away from Berkeley and watch him disappear…

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George Berkeley (1685-1753 CE) was an Anglo-Irish philosopher whose primary achievement was the advancement of a theory he called "immaterialism," later referred to as "subjective idealism" by others.

Survives

Needs to Adapt

Gone Extinct
Berkeley’s theory of immaterialism contends that individuals can only know directly sensations and ideas of objects, not abstractions such as "matter.” The theory also contends that ideas are dependent upon being perceived by minds for their very existence, a belief that became immortalized in the dictum, Esse est percipi - to be is to be perceived. Over a century later Berkeley's thought experiment was summarized in a limerick by Ronald Knox and an anonymous reply: There was a young man who said "God / Must find it exceedingly odd / To think that the tree / Should continue to be / When there's no one about in the quad." // "Dear Sir: Your astonishment's odd; / I am always about in the quad. / And that's why the tree / Will continue to be / Since observed by, Yours faithfully, God.” Well that was fun. Abstractions such as matter are categories. They are definitions we can use to group actual objects together in order to study and understand them better. We created and defined the abstractions. They do not exist in the physical sense of the word, but we can know them for what they are. Also, the physical universe happily went on before us and wouldn’t care if we went extinct.
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