Part 2/12:
To grasp the essence of the paradox, let’s begin with a hypothetical scenario. Imagine tossing a book into a black hole. According to Einstein's theory of general relativity, once the book crosses the event horizon, it is irretrievably lost, replaced only by a black hole of greater mass. In this view, a black hole is characterized by just three properties: mass, angular momentum, and electric charge—captured succinctly by the no-hair theorem, which stipulates that black holes are remarkably simple objects.