I think the exercise today was a good example of viewpoint or perspective. All the things written on the board were "true", just maybe not for everyone. In some ways asking what something "is" is the same as asking what something "isn't" just because of the unlimited amount of variation in perspective any two people will have. I can see an example of this in that not only do the answers to these questions depend on the perspective of the reader, but also the interpretation of the question. It was obvious when we went around the room that people had read the question differently with an answer like "a quarter" for the question "what is X" and an answer "a symbol of currency". The level which one analyzes the questions is solely dependent on that person.