That's a technic I call learning by figuring out. I realized some time ago that information you figure out yourself lasts longer. When some at work for example asks me something I usually only return suggestive questions. Questions wich if they answer them lead them to the answer of their questions. I always get rolling eyes when I do but it helps in two ways. First is they really manifest the wisdom so they don't need to ask me a second time and second they learn relativly fast that they have to think what to ask me and how anoying it is so they ask less frequently but more specific. People hate it but it is benefical for both sides in my opinion.