One of the most distinctive things about human beings is our imagination. We can invent things that never existed before. We can discern relationships between seemingly unrelated things. There would be no scientific hypotheses without a little imagination. With imagination we can make up stories about people who don’t exist and things that never happened. We can even hold things in our mind that are totally untrue or even impossible. And we can draw pictures of them. Although this can be quite entertaining, it can also be dangerous! So sometimes we need to just sit down and shut up and see what reality is like when we are not imagining it into existence.