It could be described in a way that was not quite so materialistic.
If every event in every instant of the universe's past and future were treated as an element of a set, then that set, which recorded all information in the universe, was itself an objective existence.
Just as the universe itself recorded "history," information was indestructible.
But the Black Hole No-Hair Theorem was real too.
Aside from five properties such as angular momentum, a black hole possessed no further information.
This was even more reliable than the Immortal Alliance's conjectures. Mindbro had admitted it while incapable of lying.
In other words, before Wang Qi personally conducted close-range observations of a black hole, Mindbro's words were the strongest evidence.
At present, nothing more credible could be found.
A black hole's mass was proportional to the area of its Event Horizon. In other words, however many atoms were thrown in, the Event Horizon would expand by a fixed corresponding area.
And from another perspective, the more information thrown in, the larger the area of the black hole's Event Horizon became.
Information was very likely recorded upon the surface of a black hole's Event Horizon.
Thus came the Holographic Principle.
People had even inferred another physical quantity from the formula for the area of a black hole's Event Horizon—"what was the minimum area of Event Horizon needed to record one bit of information?"
This became known as the "Planck area."
Recording one bit of information required at least 10^-66 square centimeters.
The Holographic Principle held that the universe currently observed was a projection of the real universe. From a relatively macroscopic perspective, the entire universe could be regarded as a two-dimensional information structure displayed upon the cosmological horizon, while the three-dimensional space observed in daily life was an effective description at