The Rules are Simple
One person here would think of a SUBJECT (Like Mahatma Gandhi, or Battle of Waterloo or Statue of Liberty etc)
(as in Person, Event etc) of some significance
and members here are invited to ask questions.
The question allowed would only be of Objective nature and should only have two possible replies .
i.e. Yes/No question or something like (is he Alive or dead ) / (Asian or Eurpean) (before turn of century or after) etc .
All in all
15 such question would be allowed and you have guess the SUBJECT with in that limit.
I propose 3 categories of SUBJECTs
1. Personality
2. Event
3. Place (of some Historical/General significance)
You have to mention at the start as to what category your SUBJECT falls in to.
Please dont put some obscure subject up for guessing .