In the universe, black holes were the most extreme entities. Anything that entered one could never come back out.
Everything inevitably fell toward the Singularity Point, and all physical information vanished forever.
Even though black hole radiation could cause them to evaporate, the energy emitted was actually energy from the outside world, not what had been swallowed back then.
Nothing devoured could ever be observed from outside again.
This law was called the Spacetime Exchange Phenomenon.
Outside the Event Horizon, spatial coordinates could shift freely, allowing movement in any direction. But time had only one direction; everything evolved toward the future. This was what all civilizations defined as "normal spacetime," a world predictable through physical laws.
But inside the Event Horizon, the two phenomena were exchanged. Time possessed countless directions, and all things could move freely through temporal states, while space had only one direction instead: falling toward the "Singularity Point."
The area shrouded by this "Singularity Point Effect" was the Cause and Effect Collapse Zone. All physical laws established upon normal spacetime in the past would fail.
Nothing that happened could be predicted anymore. After all, if all things could move freely through time, their states could defy causality and overturn conventional logic.
Of course, from the moment one stepped into this region, there was no such thing as a future. A particle's state could switch freely along the timeline from "its birth until it entered the Singularity Point." One moment it would be as it was today, the next as it was a hundred million years ago, then as it was yesterday...
This was Reverse Cause and Effect, an unpredictable place where laws were thrown into chaos.
If a Singularity Point could be exposed, its unpredictability would disrupt the normal operation of other parts of the universe. As