Re:How Can a Star Be Older Than the Universe?
by Dylan16807 on Thursday October 17, 2019 @11:13PM
(#21288349)
> I do not see how differing telescopes have anything to do with the issue.
How our telescope's observations would differ if they were placed in a different galaxy.
> it would have to be done without any tacit assumption about whether UEIS or UEOS applies
Yes! Now we're getting somewhere.
When you say "the argument is circular" that depends on all possible arguments using assumptions about UEIS/UEOS. I'm saying that you can make arguments that don't make assumptions about UEIS/UEOS. It's possible to make a circular or non-circular argument.
> In what way is that not exactly the sort of circularity that we just agreed about above, given that the real form is the issue to be decided?
Because I'm talking about measurements! You know, the same thing telescopes do. They measure. If you make measurements instead of assuming, then you don't have a circular argument.
> Mainly because you haven't said what measurements you think will substitute for Swebs' "the expansion appears to originate from wherever we are."
I don't have any in mind. I'm not saying there are any. I'm just saying that if the argument exists, it can be expressed in a non-circular form.
> point out the first statement in there that you disagree with
"We can deduce what it looks like from distant galaxies, if and only if we make some assumptions about the dynamics of the universe"
If "some assumptions about the dynamics" is supposed to include UEIS/UEOS assumptions, then this is where I disagree. We do not necessarily have to make those assumptions to make those deductions. You have not given any proof that all possible ways to deduce what it looks like will require those assumptions. We may be able to remove all of those assumptions with the right local measurements. Then we would have a non-circular argument.
How our telescope's observations would differ if they were placed in a different galaxy.
> it would have to be done without any tacit assumption about whether UEIS or UEOS applies
Yes! Now we're getting somewhere.
When you say "the argument is circular" that depends on all possible arguments using assumptions about UEIS/UEOS. I'm saying that you can make arguments that don't make assumptions about UEIS/UEOS. It's possible to make a circular or non-circular argument.
> In what way is that not exactly the sort of circularity that we just agreed about above, given that the real form is the issue to be decided?
Because I'm talking about measurements! You know, the same thing telescopes do. They measure. If you make measurements instead of assuming, then you don't have a circular argument.
> Mainly because you haven't said what measurements you think will substitute for Swebs' "the expansion appears to originate from wherever we are."
I don't have any in mind. I'm not saying there are any. I'm just saying that if the argument exists, it can be expressed in a non-circular form.
> point out the first statement in there that you disagree with
"We can deduce what it looks like from distant galaxies, if and only if we make some assumptions about the dynamics of the universe"
If "some assumptions about the dynamics" is supposed to include UEIS/UEOS assumptions, then this is where I disagree. We do not necessarily have to make those assumptions to make those deductions. You have not given any proof that all possible ways to deduce what it looks like will require those assumptions. We may be able to remove all of those assumptions with the right local measurements. Then we would have a non-circular argument.