AMA | October 2024

14372.482 - 14392.913 Sean Carroll

But maybe you make your particles really massive, right? Or maybe you make the slits very far apart and you imagine very, very sensitive gravity detectors. This is an engineering problem. This is a technological problem, not one of principle of physics, so I'm granting you the ability to use gravity to measure which slit the particle goes through. So that would count as a measurement.