Luo Zhen had actually figured out many things long ago.
For example...
"Where exactly did Chaldea's 'Fate' system come from?"
This question had been brought up before.
Or rather, many people in Chaldea actually knew the answer very well.
After all, it was no secret.
"According to what was said when the 'Fate' system was established, Chaldea's summoning system was actually developed based on Fuyuki City's 'Holy Grail War.'"
That was what Luo Zhen said.
"But if it was based on the 'Holy Grail War,' then that proves that at least Chaldea—or rather, the former director, Marisbury Animusphere—had come into contact with the 'Holy Grail War,' right?"
If that were not the case, how could Chaldea have developed the 'Fate' system based on the 'Holy Grail War'?
Luo Zhen did not believe that the Animusphere Family would possess records of the spiritual evocation ritual known as the 'Holy Grail War.'
After all, the Animusphere Family was the great aristocratic family that dominated the Astronomy Department of the Clock Tower, not the Spiritual Evocation Department. It was unlikely that they would have been involved with spiritual evocation rituals.
Therefore, Luo Zhen guessed that Marisbury Animusphere had come into contact with the 'Holy Grail War' ritual before successfully developing the summoning system of 'Fate.'
"Do you remember which Singularity we encountered first?" Luo Zhen looked at everyone and said, "It wasn't one of the seven Singularities, but the Singularity in Fuyuki City."
At that, everyone fell silent, and even Artoria [Alter] raised an eyebrow.
Back then, Artoria [Alter] had been stationed in the Fuyuki City Singularity. She had even been maintaining it.
Therefore, Artoria [Alter] could not ignore any mention of the Fuyuki City Singularity.
For that very reason, Artoria [Alter] somewhat understood why Luo Zhen had brought up the Fuyuki City