Many scientists (and non-scientists as well) live under the impression that they don't know much about research topics that lie outside those that occupy them on a daily basis. We often feel like a blank sheet of paper when it concerns such research topics. Perhaps we know more about various areas than we think. The path to ferreting out aspects that we do and don't know is lined with questions. For example, both of us authors are geophysicists, and (an understatement) we don't know much about biomedical research. Yet if we take a topic such as cell therapy, several statements (correct or incorrect, naïve or otherwise) about this area of research can readily bring a number of questions to our lay minds. A line of thinking might go as follows.