[SiempreViernes]

To claim that the standard model has nothing to do with the quantization of gravity is very strange, part of the motivation for a GUT is that it would be a huge help towards making a theory of everything. And a TOE is precisely a unified treatment of the standard model forces and gravity.

The measurement problem isn't a physics thing, just like naturalness that's more of a life-style choice. In fact, the only reason to have problems with wave-function collapse is precisely a naturalness reasoning, technically it makes very accurate predictions just fine.

[tsimionescu]

> part of the motivation for a GUT is that it would be a huge help towards making a theory of everything. And a TOE is precisely a unified treatment of the standard model forces and gravity.

A GUT is specifically the part of a TOE that has nothing to do with gravity... A TOE is a GUT + a theory of quantum gravity.

If we had the Standard Model + a theory of quantum gravity, this could be a complete theory of the universe (pending explanations for dark matter, dark energy etc.). These could very well be completely separate phenomena, there is no reason to believe they reduce to a single phenomenon - that there exists a TOE.

> The measurement problem isn't a physics thing, just like naturalness that's more of a life-style choice. In fact, the only reason to have problems with wave-function collapse is precisely a naturalness reasoning, technically it makes very accurate predictions just fine.

This isn't entirely accurate. There is a very clear quantitative question behind the measurement problem: what kind of system constitutes a measurement device, in the sense of invoking the need for the Born rule? There must be some precise size/kind of system that, when a particle interacts with it, you can no longer use Schrodinger's equation to predict its movement after that interaction - you must apply the Born rule. We know that this doesn't happen after a particle collision, but that it does happen after a collision with a "detector".

This is a clear empirical question (you don't need to call it a problem), well within the realm of physics. It may be extremely difficult to answer, but I see no reason to imagine it is a priori impossible to resolve.