What we call a sense of reality is based on the distinction between the actual and the possible. We make this distinction by comparing what we think and imagine of our own accord with the data imposed on us by the present situation. At this moment, for example, I am typing on the computer keyboard the words that spring from within me. They could be different if I wanted to shift my attention to another subject. If I write these words and not others, I can assure you, in the language the witty people attributed to former Brazilian President Jânio Quadros: