I always forget the actual examples, but a typical exchange in our house goes something like:
Us: Would you like [x]?
J: Yes!
Us: Do you know how to [stuff required for x]?
J: Yes!
Us: What do you have to do?
J: Don't know!
Us: Would you like [x]?
J: Yes!
Us: Do you know how to [stuff required for x]?
J: Yes!
Us: What do you have to do?
J: Don't know!