The recording continued.
"...In short, compared to constantly exploring the boundaries and digging downward, killing people was indeed a simple and effective method. But the resolve required for us to kill was growing stronger and stronger—it was easy for it to magnify the guilt and doubts in our hearts, so we needed a more efficient method. I knew what you were thinking. I had already tested it, so I'll tell you now to avoid wasting time: although this world is 'fake,' it isn't a 'virtual world' or some kind of 'illusion.' It should be a materially real world, but in essence, it's a 'counterfeit' created by some existence. So there's no way to detect its falseness through 'mathematical' or 'physical' means. That might also be why this world kept correcting our cognition. Perhaps the mastermind behind it couldn't interfere from the 'physical level' entirely at will. And honestly, although I haven't recalled much professional knowledge, I don't seem to have been particularly familiar with cutting-edge physics or mathematics in the first place. If I only understand the basics, then even if there really are loopholes on the physical level, digging them out would be less simple than killing someone."
"But fortunately, there's a way to take shortcuts with killing people too. I've already found an assistant. She was a Player trapped here in the past. I don't know what her condition is exactly. In any case, I chose to use our ability as 'Players' to restore her memories as well. I don't know how I did it. It seems I deliberately didn't save an Anchor Point in this area, probably because this ability of ours was crucial and needed to be kept secret. So if you remember any special abilities, you can use them directly too. In short, now that