Black hole = matter so dense that it's gravity is strong enough to pull light and warp the space time continuum, making a convenient thoroughfare for adventuresome gene rodenberry characters.
But this all defies our understanding of conventional physics. Also, the density of matter is not directly related to amount of gravity, that was what we ONCE believed, but in the past 50 years, that theory has changed. You see, scientists are constantly discovering new things, stuff we didn't know or understand before, and we advance as a species because of this. You are stuck in a world where science knows everything already, and no new information can be obtained, because you have stopped asking questions and began drawing conclusion.
Once upon a time, if they had internet forums, people like you would have been arguing with people like me, about the Earth being flat or round. I would be suggesting that the Earth could be round, it's possible... you would have been insisting that was nonsense, and not supported by science. They nearly ran Louis Pasteur out of France because he theorized that micro-organisms from raw milk, were living inside people, and causing them to become ill.
Scientists of the day, called him an idiot and a fool for believing such a thing. There was no basis in science to support his theory at that time, and it was essentially discounted as nonsense. It's very important for you to remember, science does not have all the answers, science doesn't explain all things, it's not altruistic or infallible, and certainly not complete.
Some people, like Mott, have substituted faith in religion, with faith in science. You can read this in most everything scientific he posts. He presumes science to be the final word on everything, and because science has led to a theory, that theory is automatically the "gospel" and irrefutable. Although, many scientific theories have been debunked, found to be completely wrong and lacking, and they are often altered or dropped altogether. Einstein's theory of relativity, does not account for black holes, they defy the theory. According the the theory of relativity, nothing travels faster than the speed of light... well, we know this is not always true because we've observed black holes. This was not known when Einstein developed his theory.