MSNBC.com Would you have allowed Bill Gates to be born? Advances in prenatal genetic testing pose tough questionsCOMMENTARY By Arthur Caplan, Ph.D. MSNBC contributor Updated: 12:33 p.m. ET May 31, 2005 Who needs Bill Gates? No, I don’t mean who needs a gazillionaire corporate titan, a man whose company, Microsoft, took in billions of dollars last year by controlling nearly all the software used to run nearly every computer on the planet.No, I mean, literally, who needs him? If you could go back in time and stop the birth of the world’s most famous nerd, would you?You probably answered my...