Dr. Chris Kahlenborn is an internist in Altoona, Pennsylvania. He serves as president of the Polycarp Research Institute (www.polycarp.org). He spoke with Tim Drake about the dynamics and ethics of denying a person nutrition and hydration. What happens to a person when he or she is denied food and water?The first thing is that after 2-3 days you get extremely dehydrated. That results in a lot of changes in the body. Your mucous membranes and your skin get very dry. Your mouth cracks. It's very uncomfortable. Your urine becomes very concentrated and acidic, making it uncomfortable to urinate. Then your...