Re: O'Barr: The end of SR!

Gerald L. O'Barr says...

> So let us see you try! Let us see you show us and
>explain to us, in a direct physical way, this simple
>physical 4-D reality!

Mathematics is the most direct way of explaining
physical reality. If that isn't enough for you,
then too bad.

>O'Barr comments:
> I do get carried away, don't I! But no science
>has yet shown that it is physically possible. The
>only thing that science supports is 3-D.

That's not true. The science supports the 4-D picture of relativity.

>Daryl McCullough wrote:
>>No, your retina is essentially a 2-D surface. What
>>you see is 2-D. That's what makes realistic
>>photographs possible. You (or your brain, I should
>>say) infer a third dimension by computing
>>differences between the left image and the right
>>image.
>
>O'Barr comments:
> Well, you seem intent in pressing a point.

Yes. The point is that 3-D is an inference made
from observations, it isn't something that we
know directly.

[description of 3-D vision deleted]
>And if this is inferring, then it is
>inferring, but it is 3-D that must be there even in
>order for the 'inferring' to be done.

I would say the same thing about 4-D. We
infer it.

--
Daryl McCullough
Ithaca, NY

.

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