What kind of questions can make fortune tellers speechless?

There are too many questions that can make fortune-tellers speechless, such as: the problem of managing the country with peace and prosperity, the scientific principle of "two bombs and one satellite" ... The fortune-teller must be right. Therefore, it is normal and not shameful for him to be speechless on any question beyond his fortune-telling project. Even within the scope of his fortune-telling projects, he only dares to call himself "fortune teller", and sometimes he is speechless. No fortune teller dares to say that he knows astronomy and geography, and he can protect the country and govern the country ... whoever dares, he is crazy!