Monkeymind comments on Configurations and Amplitude - Less Wrong

26 Post author: Eliezer_Yudkowsky 10 April 2008 07:41AM

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Comment author: Desrtopa 14 April 2012 04:04:55PM 5 points [-]

No, you're not making too much sense for someone who's profoundly ignorant, you're making too little sense for someone who knows what you seem to know. It's possible that you've actually gone out of your way to pick up all these words and pass phrases without having any idea what they mean, and that's exactly what you're acting like, but I don't buy it.

I don't want to continue a discussion with you if I think you're willfully refusing to understand, but I like this analogy, so I'm going to toss it out and if by some chance you're not faking and it actually helps, it'll give us something to work with.

A person who is born blind and grows up that way does not have the neurological faculties to process an image and take information from it the way we do. A blind person may have a concept of "sphere" or "cube," and know what they will feel if they run their hands over one, but if a person who'd grown up blind were given functional eyes and looked at a sphere, they would not be able to tell you in advance that by running their hands over it they should feel a smooth surface that curves uniformly in on itself. This was an issue which was debated for some time by philosophers, but eventually we developed the medical technology to actually give eyesight to some people who'd grown up without it, and it stopped being just a matter of "logical argument," and became something we could go out and actually check.

If you were to take a person who'd grown up blind, and try to explain the concept of looking like things to them, it would be incomprehensible to them. Generally, blind people take it for granted that sight is a real phenomenon that they're missing out on, because civilization around them runs on it in such a way that it wouldn't make much sense if all the sighted people were just making it up. You could describe the mechanics of sight to a blind person, but they will not be able to conceive of the idea of "getting a picture in your head" the way we do. If a blind person told you "Don't mess around with math and diagrams (which I can't see anyway, so fuck you,) just give me an explanation of this whole "picture in your head" thing which you say lets you tell what shape something is without touching it," no matter how you explained it, you wouldn't be able to get them to understand sight like we do. It's not that there's something wrong with our models of how sight works, the problem is in the brain of the person who's never developed a capacity to deal with vision.

Similarly, our brains don't have the capacity to picture what's going on on the scale of fundamental particles. There's no reason why they should. Like blind people dealing with sight, we can explain what's actually going on, but it's never going to make intuitive sense to us. Can't visualize a zero dimensional particle? Well, who says fundamental particles have to have size? Who says there can't be any real thing which doesn't take up space, so you can pack any number of them together without ever getting a bunch an inch across? Who says that you can't really tell what shape something is until you run your hands over it?

If a blind person, unable to comprehend sight, decides that sight doesn't exist, there will be things in the world around them that just don't make sense to them. Similarly, there are physical theories which we can't picture, but we can tell that the world around us makes a lot more sense if they're true than if they're not.