How about counting each sentence's words? No sense. How about counting letters of each sentence? Too many. The key is to notice that all questions are of yes/no type. Let's first concentrate on those questions where the answer is definitely negative. Why Lebanon, Hanoi or Renoir? Why is a bad decision to go home now? Well, they all contain "no" already inside. Similarly, all positive questions contain "yes" somewhere inside. Choosing only the good set gives enough hints to identify Philosophencafe in C 52.