EternalUniverse said:
II
Subjective idealism explicitly denies the existence of a mind-independent reality. Berkeley argued it was unintelligible.[/i]
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EU
Fair enough. For subjective idealists, then, shouldn't they distinguish between "having no justification for an external world" and "explicit denial of an external world"? It seems that the latter is too extreme. If all we have to go by are our experiences, then we really can't say for certain if these experiences are caused by something external to the mind.
I'm really not happy with this "external world" business. So instead I'm going to refer to it as MIR (mind-independent reality).
Now, if we have no justification for the existence of a MIR, then why believe in it? But Berkeley went beyond this. He maintained the notion of an MIR is unintelligible. If there is a MIR chair for example, then what is it like? I mean is the real material chair similar to the experienced chair? Is the real material chair (external to all minds) brown in color? Note that we're talking about brownness as perceptually
experienced. So can this non-experienced reality be exactly like our experiences? I don't know what Berkeley's arguments exactly were (I can't remember) but it is a completely unnecessary duplication. Why is there a need for a material chair which is exactly like the perceived chair? And it's opposed to what science says anyway. This brings us to the consideration that the material chair is quite unlike our perceptual experiences of it. But if the material chair is quite unlike the perceived chair, then
what it is exactly like must forevermore remain unaccessible to us (like Kant's nounema). Again, why suppose the existence of a wholly, in principle, unknowable reality?
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Originally posted by Interesting Ian
I don't want to talk about other idealist positions. I haven't read up enough on them. Yes Berkeley thought it was God who directly conveys to us our sensory experiences. This explains their order so that we see discrete physical objects rather than a chaotic jumble of sensory impressions. Do you find this unsatisfactory?
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EU
Well, he is using a claim which may or may not be true (the existence of God) to support his version of idealism, so probably not.
He infers the existence of God. Our sensory perceptions are ordered into certain familes we call physical objects. But we could have existed in a Universe where our sensory perceptions were completely random, and chaotic, and unpredictable. So there must be intelligence behind the order we see. Basically he is inferring the mind of God in much a similar way to which we infer the minds of other people. Just as other peoples bodies act in a way suggestive of purpose, so does the Universe as a whole act in such a way to suggest purpose (and therefore a mind responsible).
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Originally posted by Interesting Ian
Berkeley argued that it is merely what we call the physical world which is simply patterns in our sensory experiences. He said there are selves and their ideas. Selves are not constituted by ones sensory experiences. How could they be?
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EU
First, how can he even talk about 'sensory experiences" if there is no external world to "sense"? At least, with an explanation that doesn't include God.
The name is unimportant. Call it qualia, perceptual experiences or whatever. Actually he uses the term "idea", but the meaning of this term has slightly changed since Berkeley's time.
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Originally posted by Interesting Ian
Idealists infer the existence of other people in the same way as interactive dualists do. Basically by analogy. I know I have a mind, and that my bodily behaviour is partially due to that mind. Therefore it is reasonable to suppose that other peoples bodily movements are caused by other minds.
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EU
I still do not know how idealism, which denies an external world, can not lead to solipsism. If you deny the existence of any "mind-independent reality", then you also deny the existence of other minds. Unless, of course, you believe in Berkeley's contention which uses God in its explanation.
Subjective idealism is denying any reality independent of any minds. It's giving an analysis of what it means to talk about the
"physical". Remember that, for the non-materialist, minds are not part of physical reality. So Berkeley has no more reason to be a solipsist then interactive dualists.
Basically he said this about physical reality. What we understand as "physical reality" cannot be abstracted from a perceiving subject. If you maintain there exists an unexperienced reality, then, by definition, we cannot know about it through experience i.e we cannot experience the unexperienced. Nor can we know about it through reason which I explained at the beginning of this post. Saying you can have a reality in abstraction from any mind is like saying you can have a grin without a cat.