This picture can be interpreted many different ways. I think that what ever this curious person is thinking/saying is being questioned by many other people. These other people (the outside question marks) can have their own output on this one topic, causing more people to become curious. To me, this picture is a never ending chain, based off of one specific topic. I believe that the main question mark could be life. Everyone has their own way of thinking of life, and in the previous summary, the author had two ways of looking at life. What does everyone else think?