So what exactly had humanity seen in the ultra-microscopic world? Or rather, what had they vaguely sensed?
The answer was String—the thing that made up the ultra-microscopic world, Microscopic High Dimension structures, and perhaps even the universe's most fundamental substance, yet was also exceedingly ethereal.
That was the account of a scientist who had completed the evolution of conscious perception through years of training. He said that the things he had "seen" in the ultra-microscopic world might have been all manner of miraculous structures composed of String.
But he could not say for certain, because no one had ever seen String.
He called it String only because, within Human Civilization's system of knowledge, String was said to be the universe's tiniest vibration. Based on that understanding, he believed he had seen String Structures.
Whether it truly was or not still required extensive verification.
How could it be verified?
Naturally, the structures he had "seen" had to be compared against existing String Theory. If they matched, they were the String of Human Civilization's physical theories. If they did not, then perhaps they were not String—or perhaps Human Civilization's String Theory was wrong.
So how would they make that comparison?
They obviously could not compare subjective sensations like "seeing." Instead, they would compare formulas and laws derived from the patterns summarized through that "seeing" with the results deduced from humanity's own theories.
This research might turn Superstring Theory from a hypothesis into an established truth.
Even now, for humanity as a Level 5 Civilization, Superstring Theory remained a hypothesis.
Human physicists had always been especially interested in Superstring Theory because it forced people to change their understanding of the nature of matter. Humanity's earliest understanding of matter dated back to the Spring and Autumn period, when people had already realized that all