| A. The noise, just like the tree itself, doesn't exist in any meaningful way when absolutely nothing is hearing or perceiving it. |
B. It makes the same sound as one hand clapping. |
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| C. When the tree falls it causes vibrations in the air, but in the absence of a perceiver they don't get converted into an experience of sound. | D. Even if there are no human beings around there is likely to be some living thing in the vicinity - eg a badger. | Ask a friend | |
C. is the right answer.
Locke doesn't think the existence of a thing is at all threatened by it's not being perceived. Berkeley thought it was, and had two answers to the question of what happened when a thing was not being perceived by us. A. is a sort of crude version of Berkeley.
D. misses the point.
B. I don't really understand what this is saying, though I'm fairly sure Locke wasn't saying it.
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