Microscope in Space
The biggest obstacle for proving the phantom black hole is the fact that it is literally invisible. A black hole gives off no light, not even slightly. The other big issue is how small the hole actually is. Even though black holes have such a strong gravity they hold in multiple universes, they are too small to find in space. The other issue is that because we have never really been able to get close to a black hole, we do not know very much. Many of the minor details are speculation by scientists in the field. You also cannot re-create one to observe without risking the demolition of our solar system. We do not really know what particles make up a block hole or exactly what happens to anything engulfed by one. Because of all of these questions there still are floating around with the black holes in space, it’s hard for anything to be written in stone because well all you could write is pretty much just questions.
This lack of direct evidence causes the biggest problem for scientist because the way we learn about things in science is to test. What do you do when you cannot test? You theorize. Well, that is not science then, it is now philosophy. This, as you can see, is a big issue. In the scientific method, you first theorize (we have been over that part plenty), then you gather information… stop. Here is where we are stuck. Yet there are so many more steps to follow!
In the future, we will definitely get closer, if not succeed. It is that unknown factor. The world had no information for hundreds of years about so much. We never thought that our body could be broken down into tiny objects not visible to the naked eye. The quest humankind traveled to see things through a microscope would travel along the same similar problem timelines we are living now with black holes.