Doppler shift, yes. Light is the same speed in any frame. It is not the same frequency or wavelength. Those are frame dependent measurements. A photon...
Interesting. Perhaps we could define a duplicate as not just a state, but one that persists for a second or so as a natural duplicate should. A Boltzm...
Absolute time is fiction. I can't prove there are no invisible pink unicorns, but I can't detect them either. To say there is no absolute time is to s...
Who is wrong? The guy who labelled as a paradox the twin-experiment? It is indeed not a paradox. But you're also labelling it a perceptual problem, so...
Who would benefit from hiring a philosopher? The whole point seems to be thinking of things with no practical application. If there is something pract...
The type-3 ones are also not other universes, for more or less the same reasons. You mean there is a pile of near-replicas to go with each actual repl...
That one makes a bit of a hash of the Copernican principle at least. Ossipoff's initial post on the prior page was such a violation, but there is no s...
I comment on something like this earlier. Such a space is not flat, so it would need to be big enough to account for whatever measure of flatness they...
OK, My terminology is wrong. Orientable, yes. There is no obvious origin, hence no actual grid. It is the orienting that suggests a preferred referenc...
Well, only if the space was smaller than the hubble-sphere (which it very much is in asteroids). You could see the repetitive things line up in certai...
I should have quoted more. I meant to ask if there was no grid in the sky if the space was torrid manifold. I then gave the example of the asteroids g...
Not always there. No new thing at all, so nothing to always have been there. Schrodinger's cat is the best example. The cat is both dead and alive, wi...
Is this true? I play asteroids in a flat 2-torus space, not on the surface of a donut embedded in three-space. If I fly along either axis, I return to...
MWI is not an ontological stance. No creation of new universes or new material ('somewhere' as fishfry puts it) occurs, and energy conservation laws a...
A bit off topic, but I've always noted that the orientation of the three spatial axes (X, Y, and Z) is arbitrary. If there is an actual x axis, which ...
Unconvinced we disproved it. I left convinced that a random stab will hit a zero-probability 'typical number' which are uncountably infinite. There ar...
Well, you list others, so there are other known interpretations. Support of MWI is growing among physicists, but it has yet to reach a majority. For t...
Well, I hit a different one that cannot be hit, so I'm on thin ice to counter this. But having hit this computable number, I must in addition throw in...
Trying to discredit my own statements. You take a stab at a number line with a pointer and you will hit a 'typical number' as I call it. That number c...
.3333... is not a sequence of random digits with equal probability. It is in fact the decimal notation for 1/3, something that can be expressed in a f...
I am told that contemporary models are not of infinite comoving space. Not being an expert, I have no ground to assert otherwise. So yes, I backtracke...
If so, the dup-Earth bit kinda falls apart, eh? No, disagree with this. A finite sequence has a nonzero probability. An infinite one is not a specific...
Good point. Isn't just a curvature measurement enough? If flat enough, there are places sufficiently separated to never interact. Yes, expansion is re...
Indeed, it doesn't require infinite space. It (a type 1 world, not a duplicate) does at least require an expanding universe, else eventually light wou...
Models say otherwise. For the distance to be finite, there would need to be an edge where there is stuff only on one side, and not uniform as we see i...
They're not separate universes (especially types 1 and 3), just separate worlds in this universe. For type 1, the distant Earth is a true duplicate. T...
It is a Tegmark designation, and I'm not sure how much the video gets into it. Type (or level) 1: Places that are too distant to causally interact wit...
I didn't watch the linked video. For the record, quantum mechanics does not say the multiverse is real or is not. Not sure what 'physics' is wrong or ...
Yes there is such a law, and it is used in the articles linked. They've demonstrated the accuracy of some clock to X digits, and not by using a more a...
Not sure what all else to explain. A photon, or anything else with no rest-mass, is missing half the properties of a classic object due to the inabili...
Exactly so. Light has no frame, travels in no specific direction, cannot rest, has no mass and exists in no time of its own. But all these things are ...
If you have a pulse, you have a clock. Lousy precision, but a clock nevertheless. You can time the boiling of your egg by counting heartbeats.The coun...
In the spacetime model, the temporal dimension is distance just like the other three. There is physical distance between any two events, and that dist...
Read the links fdrake posted. They answer exactly this question. At the sort of accuracy they're talking, two clocks would need to be in exactly the s...
I think you ask about what if the radioactive same ticked regularly. Then the decays would not be random events, but regular ones. All similar-rate sa...
My counter example works fine with nanoseconds. The radioactive samples might tick every nanosecond and the example still holds. The two samples would...
Without the precision required to navigate a boat. I didn't say it was done without time measurement. Massive precision is needed only for more recent...
This is true of weight pendulums like the one in a grandfather clock. Such clocks run slow on the moon for instance. There is a mass-pendulum in my wa...
It is reasonably constant, and the Newton's laws of motion (the first two mostly) say this. This is not proof, just a very successful set of laws that...
No clock was used to verify this. Clocks were made to sync to this. The day verifies the clock, not the other way around. For the length of the day to...
It is not constant. Ever notice all the complexity of the pendulum on a grandfather clock, with all those bars made of different metals? It's not just...
Wrong conclusion. It finds that current models don't necessarily match what is seen. If the findings were accurate, the universe should be different, ...
Because you get the exact same result from countless repeatings of the experiment. I get different results from the time measurement of my grass to gr...
Sure, a tagged oxygen atom is likely to survive 2000 years I think, and would most likely be found still on Earth, in a place of highest oxygen densit...
Events are still usually ordered under determinism. 2017 is after 1917, so the relations 'before' and 'after' have meaning just like the relations 'ab...
So all of language is wrong if eternalism is the case? I don't consider saying that "Xmas will be on a Monday" to be an assertion of presentism. It's ...
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