Fred looked at the Pensieve in front of Vizet. "Vizet, have you been solving problems lately?"
George added, "Did you... find something in that memory?"
"Solving problems?" Neville and Hanna remembered too. "You mean that 'puzzle' memory full of all kinds of magical knowledge?"
Vizet nodded. "That's right. That 'puzzle' memory. I only finished solving the whole 'puzzle' recently."
He had once discovered a memory belonging to Helga Hufflepuff in Hogwarts's kitchen, protected by Ancient Magic Power.
That memory from Helga Hufflepuff had Ancient Magic Power protecting it in the form of "puzzles."
Just reading those puzzles required mastery of Runes before one could know what the specific puzzles were.
After learning the specific puzzles, one still had to solve them step by step. Only then could one obtain Helga Hufflepuff's memory.
There were simply too many puzzles inside, covering a whole series of magical subjects, including alchemy, Herbology, Potions, Charms, and more.
Not only were the magical subjects covered extremely comprehensive, the difficulty levels of those subjects were comprehensive as well. It was actually very suitable for... exams.
Vizet had shared the memory about the puzzles with the members of M, which was why Fred and the others knew about the "puzzle."
Only after Vizet solved the "puzzle" did he discover that the founders involved in this memory were not limited to Helga Hufflepuff. There was also Rowena Ravenclaw.
In that case, it explained why one had to first master Runes, then solve every "puzzle," before truly seeing this memory.
Thinking of that Bronze Ring that loved asking questions... this memory really did have Rowena Ravenclaw's style.
After Vizet learned the specific contents of the memory, he more or less understood Rowena Ravenclaw's good intentions.
After all, the knowledge involved in this memory truly required the combination of