Black holes have an image problem.
For instance, its not true that stuff that is dropped into a black hole vanishes forever. Eventually, the physics wizards now tell us, the stuff comes back out - maybe a little bit rearranged. Even the name is kind of suggestive - proctologists are naturals for this approach. Now these individuals might look differently on the matter of shooting one's grandfather. There is one final matter - one last question relating to black holes that seems to stump everyone.