Question: According to Bert Gordijn, what are some of the optimistic visions involving nanotechnology? What are some of the pessimistic predictions involving nanotechnology that Gordijn describes? Identify and briefly describe the three nanoethics issues examined by James Moor and John Weckert. Why do some critics, such as Bill Joy, question whether we should continue nanotechnology research? What is the Precautionary Principle, as applied to scientific research? Can it be successfully applied to concerns involving research in nanotechnology? Why does John Weckert believe that we should "presume in favor of freedom" in scientific research?