Physics is shit

So you have this gravity law. But does particle attract itself?

I.e. does it work like (mapcar (lambda (X) (gravity X Xs)) Xs) or X should be excluded from Xs, before gravity applies?

>>27

well, that's the thing. I could think that reality is a construct of some form, but I wouldn't be able to know. But then you get into the whole, what is knowledge thing, which is a little loose and hard to define in itself. I could guess that reality is a certain way, and I might happen to be correct by luck, but I could just as easily be wrong. And when I see a cup sitting on a table, I could think that there is a cup on the table, and I might happen to be correct, but I could also be wrong if it was actually an optical illusion. I could say that there is a 2D pattern of light representing a cup hitting my retina, but I could also be wrong if it was actually a hallucination, and the image was created within my mind. But fundamentally, something is happening. It's how I interpret it that leads me to the possibly incorrect notion of there being a cup on a table. So, I'm willing to assume that there is a reality, but when one says that reality is actually X, they are assigning an interpretation to reality, and this interpretation could be false just as easily as it could be true. It would explain a lot if reality was based in some mathematical, computable thing, quite like how it would explain a lot if there was actually a cup on the table. I don't normally hallucinate (to the best of my knowledge) and people don't normally go out of their way to build optical illusions for me (to the best of my knowledge), so I could say that the cup is likely actually on the table. And you could say that reality usually functions in accordance to mathematical laws that we have come to understand in some areas. It would make sense if it actually worked that way. But you can never know that's what it actually is. You can base models around it, and you can believe it yourself, but you'll never be able to confirm it absolutely. After all, for all we know, the laws of physics could all break in 10 minutes, with objects soaring up into the sky, and dissolving into rainbows. You wont be able to confirm that it wont happen until ten minutes from now. You could say that such an event isn't very likely, as it has never happened in the past, and if you restrict yourself to a model of reality, you could say that such an event is impossible. But the model could lead to an incorrect conclusion, and just because it has never happened before in recorded history doesn't mean it can't happen in ten minutes.