Demystifier's latest activity

Your very question proves me right, because you ask about the physical meaning, namely about the interpretation. But I meant it as an...

I'm not sure about that. Suppose that someone tells you that the Schwarzschild ##g_{\mu\nu}(t,r,\theta,\varphi)## is not a metric...

The difference between Schwarzschild metric and black hole spacetime is in the interpretation of the interior behind the horizon. But we...

"The exact Schwarzschild metric" is not the same as "a black hole spacetime". The issue here isn't the local solution; it's been known...

How do you reconcile this claim with the actual published literature on perturbative quantum gravity? For example, here are two recent...

There is a classical version of this. Formulate gravity as a spin-2 field on a Minkowski background. Develop a perturbative method of...

Tidal gravity can be measured--it's not "fictitious"--but in GR it is not a force. A force is something that causes nonzero proper...

Why do you think I'm sure? But as Dale said, that's off topic.

Excellent! I like the idea that, at some small distance scale, the space is discrete rather than continuous. If true, then the...

We are already in that situation with GR alone. So why should we hypothesize about unknown possible future theories when we can already...

I have no problems with accepting that gravity is a fictitious force according to GR. But physicists are used to think that the theories...

But then the opposite statement, that the theory does not decide what we can observe, is also false, because many seminal observations...

A quote from the book A. Becker, What is Real? Safely ensconced in his apartment, Einstein finally asked Heisenberg what he really...

Anthony Leggett obituary https://www.nature.com/articles/d41586-026-01010-z a great theoretical physicist in foundations of physics...