It's not, because this is all theoretical. Not a single thing here has ever been proven experimentally. Black holes do not exist, nor does hawking radiation.
There's no direct proof yet, but we have detected the magnetic fields that theories predict, and of course observe the gravitational effects. The Event Horizon Telescope[0] will probably deliver something more tangible by 2018.
[0]http://www.nature.com/news/how-to-hunt-for-a-black-hole-with...