Spacetime paradox.
Wu Pifu was no stranger to this. Setting aside philosophical and scientific theories, he had once carried out a spacetime rewind himself, all to revive people while avoiding a spacetime paradox. Though he had succeeded, it had also made him understand just how difficult it was to rewind time or evade a spacetime paradox. For him, either one had been a near-death ordeal.
That was only a spacetime paradox within the normal spacetime of the Dream World. Yet at this moment, the spacetime paradox that had caused Gao Changgong and the others to vanish into oblivion came from the Contamination Source. That was truly terrifying. At least so far, there had been no solution.
"I find this strange."
Advanced Math Old Man suddenly asked, "Since they chose to search for you by becoming lost as individuals, did they not know that a spacetime paradox would make it impossible for them to tell you any information? The result would inevitably be futile, unless..."
Wu Pifu immediately fixed his eyes on Advanced Math Old Man. Seeing that he seemed hesitant, perhaps uncertain, Wu Pifu said at once, "Just say it. Don't hold back."
After thinking for a moment, Advanced Math Old Man nodded. "All right. Though it sounds unbelievable, I just considered 829,647 possibilities. Only this one came close..."
"Wait, you really work with advanced mathematics?"
Wu Pifu cried out in instant awe.
Advanced Math Old Man revealed an indescribable expression. Wu Pifu immediately waved his hands. "No, no, pretend I didn't say that. Please continue."
Pointing at Gao Changgong and the others, Advanced Math Old Man said, "A spacetime paradox occurs when something that has not happened appears in the past, creating a logical contradiction. But if something that already happened in the past becomes known in the future,