"Yes. The Empty Mirror Sea was too vast. Most memories that rushed in from the outside world were chaotic, and they were quickly washed away. The odds of finding mirror memories with specific content were very low."
Angel frowned. "Then why did the Tooth Fairy Ruins have the mirror memories you were looking for?"
Laplace said, "I mentioned before that the Ancient Tooth Fairies in the Tooth Fairy Ruins—the Mirror Sea Scholars—developed the Object-Finding Art. Using memory fragments salvaged from the Empty Mirror Sea, they could link to and locate physical objects that had drifted into the Empty Mirror Sea along with those fragments."
Angel remembered that as well. Put plainly, the Ancient Tooth Fairies were "panning for gold" in the Empty Mirror Sea.
Laplace said, "And the Object-Finding Art I mentioned before was actually its original version. The current Ancient Tooth Fairies could not only use the Object-Finding Art forward, but backward as well."
Angel asked, "What do you mean?"
"Using it forward is what I just described: relying on memory fragments to search for physical objects that drifted in."
"Using it backward means searching for corresponding memory fragments through physical objects. Moreover, this search does not require a strong connection; a weak connection is enough."
Angel only half understood, and asked in confusion, "Strong connection? Weak connection? What do those mean?"
"A strong connection means the physical object must correspond directly to the fragment. A weak connection does not require a perfect match."
"You can think of it this way. If you picked up a hat on the road, the hat and the owner who lost it had a strong connection. There was an internal logical link between them. But the hat and someone for whom it happened to fit perfectly had a weak connection. In other words,