(February 20, 2018 at 8:43 pm)Jehanne Wrote:(February 20, 2018 at 8:15 pm)polymath257 Wrote: First, the singularity is NOT an event: it is a failure of the coordinate system to describe a situation. In this case, if you use standard general relativity, it describes a limit of infinite curvature.
Yes, it actually is part of the theory that the *previous* spacetimes already exist.
Note -- A "singularity" is an actual infinite!!
If we have no other reason to suspect our theory that arrives at singularity is flawed, then we might think when the theory points to singularity, then an actual infinity is a probability to be taken seriously.
But in case of gravity and blackholes, we actually have strong reason to believe the theory of gravity breaks down well before things reach infinity.