Yeah, but their attitude seems to be "No. Do not ask those questions. If it hasn't been done then it can't be done. ", rather than "That's a good question. Here's what I know about the subject and ___ Sedai may know something as well. For now, apply yourself to your studies and, when you become Aes Sedai, you can look into that yourself." You can caution Novices/Accepted away from experimenting (and punish them harshly if they do), while still encouraging intellectual curiosity.