> Time dilation as predicted by special relativity is often verified by means of particle lifetime experiments. According to special relativity, the rate of a clock C traveling between two synchronized laboratory clocks A and B, as seen by a laboratory observer, is slowed relative to the laboratory clock rates. Since any periodic process can be considered a clock, the lifetimes of unstable particles such as muons must also be affected, so that moving muons should have a longer lifetime than resting ones. A variety of experiments confirming this effect have been performed both in the atmosphere and in particle accelerators.
Though experiments are flawed in a way that a untyped logical statements may be - they mix and match abstract concepts with "concrete" ones so to speak. It is just a type error as multiplying birds by trees.
Everything which follow the famous two lighting and a train thought experiment is simply logially flawed. Full of type errors.
Time as we know it, which presumably could accelerate and what not does not objectively exist, exactly and precisely the way numbers does not exit outside one's mind. Relations are, numbers not. Processes are, time isn't.
You can refuse to call it 'time', but there's something that adjusts in an extremely predictable way that matches the relativity equations. And that something is what people are talking about. The measurements are very definitely correlated; they skew as predicted to high precision.
Do you have any objection to the output of the equations matching reality, or do you just object to how we interpret the equations? Because the former is physics, and the latter is philosophy.
If you have different physics, use it to make predictions, show those predictions are different from what the current physics says, and then do experiments to show your predictions are correct. Otherwise, you have nothing to say.
It also varies based on velocity. You can easily calculate the effect of gravity alone on a GPS satellite and it doesn't give you the right number.
But what's the difference between every physical process slowing down, versus time dilation? Unless you're arguing that somehow only clocks slow down, and not other things?
Again, this is a man-made device being affected by gravity, not time.