Scrolling through unanswered questions, I came upon:
which asks if there are any guided outdoor rock climbing tours based in Bangkok.
Questions of the form "Are there any X?" are very simple to answer in the positive, requiring just one example, but, if the answer is in fact "No, there aren't any X," it seems the question will remain unanswered, well, until someone launches an outdoor rock climbing tour departing Bangkok. (The answers "I couldn't find any X" or "I don't know of any X" seem unsatisfactory from anyone except a definitive expert in the domain.)
What constitutes a satisfactory answer in the negative to a question of this form? Or is it intended that "Are there any X?" questions will remain unanswered until they can be answered in the positive?