# Are physicists still ignorant of the existence of real singularities?

(1) Is the gravitational singularity (or space-time singularity) the same as the black hole singularity?

Physicists are undecided whether the prediction of singularities means that they actually exist (or existed at the start of the Big Bang), or that current knowledge is insufficient to describe what happens at such extreme densities.

Is this really true? As I know, A lot of physicists think there is no real singularity in nature, but are they still unable to make decisions about the existence of actual singularities? I wonder if there is no singularity in nature apart from the completion of physics theory that can measure or predict a certain physical quantity by removing physical infinity.

• To exist means to move in time. The GR singularities don't move in time, so they don't exist. Counting time by Planck units $t_h$, the beginning of the universe is not $t=0$, but $t=t_h$, at which point $t\ne 0$, so the size is not zero either, thus no true singularity. In black holes, singularity does not exist for an external observer, because the internal spacetime is causally disconnected from ours. For an internal observer, the singularity does not exist at any moment of time until time ends. Again, the last moment is one Planck unit away from the end and then nothing. So no singularity. – safesphere Aug 26 '18 at 5:21