"Hey you! How do you open this box!"
The dwarf who always lies replies:
"Aha! You return at last! Worry not, for I can tell you how to open the box!"
The dwarf who always gives bad advice(?) whispers loud enough for you to hear.
"(do you actually know how to open that?)"
"I will tell you the ingenious solution BUT FIRST! THERE IS A TEST! TO SEE IF YOU ARE WORTHY!!!"
"(oh don't)"
"You shall answer me these questions three! FIRST QUESTION! What has four legs in the morning and three legs in the afternoon and two legs in the evening!?"
"(come on even i guessed that one)"
"(Yeah but you're good at riddles)"
"(i think you got it wrong, isn't it two legs in the afternoon?)"
"(I said that, don't worry about it)"
You're not sure if you should tell them that you can hear them.