 How does the writer use twins in their argument?
When Clinton says, "Let us resist the temptation to copy ourselves," it comes from a man not known for resisting other temptations of the flesh. It's an easy way to show sound-bite leadership on an issue that everybody is talking about, without much risk of bitter consequences. There is nothing like banning the nonexistent to show true leadership. He also openly claims the authority to decide how people reproduce. Essentially all reproduction is done these days with medical help--at delivery, and often before. The only difference is that the DNA of sperm and egg would be replaced by DNA from an adult cell. What law or principle--secular, humanist, or religious--says that one combination of genetic material in a flask is OK, but another is not?
 They show that clones already exist, and are proven to grow as individuals and have their own individual rights.
 They show that clones already exist, and are proven to grow as individuals and have their own individual rights.  They show that like twins, clones use the same DNA to make people with shared characteristics.  They use twins to show that if clones did exist, they would grow up the same way that twins do.  They show that twins are a common occurrence, meaning cloning would not be such a new concept to introduce.