Thanks, Eagle92
I would not tell him it's a bad idea,
In some situations, I can agree with you. But my read on the situation, and I could be wrong, is that the young PL lacks confidence. In that case, letting him come to a wrong conclusion and failing is worse than forcing him to come to the right one.
In other situations, your right. Sometimes kids will give you a wrong answer just to get you to give them the right one. If you think they're doing that, you method is effective in nipping that behavior in the bud.
A word of warning though, make sure you word your response in a way th