This class had taken a bizarre turn. They'd started with turtles and now they were talking about using sieves as a means of deciding whether or not someone was guilty of something. Toby was used to racing thoughts and jumping from topic to topic in his every day life, but this was sort of making his head spin. He creased his brow in concentration, still leaning forward on his arms, and try to follow along with what was happening, though he was still in a state of having copped a major sad about the disappearance of Bob.

Did they really have to partner with someone? Toby was sort of in a mood and only really wanted to work by himself. In any case, he went to grab a sieve and returned to his seat. If they ran out, he'd not be opposed to someone working with him then.

As for the question...? Yeah. No idea. But thinking of an answer was a good distraction, so he raised his hand and tried anyway.

"Aparecium, maybe. That reveals things." And it wasn't only for ink, so... the connection was there. Kinda.