"Air?" another Ravenclaw student chimed in. "We need to breathe air, so 'air' is something we depend on to live..."
"If we only look at the earlier lyrics, thinking that way does make sense. But don't forget, the Merpeople didn't only sing one line."
Another Ravenclaw student said, "If the treasure is 'air,' then the so-called hidden in something pure means taking back air..."
"Thinking about it that way, it really doesn't make sense! The Black Lake is bottomless, and what's more, we're wizards. If we're already capable of diving into the Black Lake, we should have solved the air problem already."
The students began chattering all at once, and the whole Common Room grew noisy and chaotic;
After many people stated their opinions, they ended up clashing with other students in order to defend those opinions, arguing until their faces were red.
Bang!
Just then, an explosion rang out in the Common Room, cutting off everyone's arguing.
"Everyone! Everyone!" Roger Davies, captain of the Ravenclaw Quidditch Team, called out loudly. "You seem to have forgotten... what Vizet said just now."
"Vizet said that even if you know what the clue is, you have to keep it in your hearts and can't tell him... After all, this is a rule of the Five Champions Tournament. We should at least show it some respect, right?"
"That's right! So other people don't use it against him," one Ravenclaw student agreed. "Everyone saw what happened with the Goblet of Fire before, didn't they?"
"They've done that kind of thing before!" one Ravenclaw student said indignantly. "It clearly wasn't Vizet's problem, but in the end Vizet had to face the Fire Dragon alone."
"Just like that Karkaroff!" another Ravenclaw student said angrily. "He actually gave Harry and the others four points, and then didn't