SINGULARITY

Proton electron annihilation must release neutrons as annihilation releases the strong force between neutrons and protons.........in the nucleus.The only way we know a black hole can form is for a nuetron star to collapse under it's own gravity.
and the big crunch must also be a core of nuetrons with supernatural gravity.Gravity so strong it produces a different kind of singularity where a big bang is produced instead of a black hole