Example:

somekinofpersonidunno: What's a machine?
anotherkindofpersonidunno: A system containing mechanical power and different parts
theotherkindofpersonidunno: What is mechanical power?
thefinalkindofpersonidunno: It is a force created by moving parts
ohwaittheresanotherkindofpersonidunno: What is a force?

You answer the question above you but DO NOT ask something
The person below you WILL ask what is (a word found in your answer)

Ok i start

What is a forum game?

A forum game is a set of rules in a forum environment where people have to follow a pattern with their posts and have fun :p

what are those rules?