She was actually right? Well half right anyway seeing as the hair loss wasn't considered a curse--she still wanted to learn it though...no matter what it was.

Lex eyed the object, deep in thought. It didn't look cursed...but then, she didn't know what things under a curse were supposed to look like so she decided not to question it--

No way! There was a spell you could use to tell that kind of stuff?! Neat! She sat back and waited once again for the answer to start pouring in from different people and smiled a little when she heard the consistency in the responses...this meant it was right; either that or they were all wrong in which case they were all idiots. After scribbling both answers down she raised her hand and gave the woman a smile; she wanted her participating right? Well she would; using everyone else's answer. "Professor I'm gonna go ahead and guess that you could use either Arithmos Revelio or SpeRevelio." But only 'cause that's what everyone else was saying.

See? She could be productive and participate.