2 Men in a classroom , one standing and one sitting while participating in a discussion .
It is impossible that a discussion occurs as a man sits on a chair as another person stands near a whiteboard .
Chances are about even that a discussion occurs as a man sits on a chair as another person stands near a whiteboard .
It is impossible that a discussion occurs as a man sits on a chair as another person stands near a whiteboard .
A discussion occurs as a man sits on a chair as another person stands near a whiteboard .