A.) Winner has argued that machines can be our surrogates, but can a machine ever replace us? Can a machine, as suggested in some science fiction movies, ever become conscious? How do you define consciousness? Can a computer program ever make responsible decisions? Then can we hold them accountable?
B.) How have medical technologies affected our understanding of death? How have they affected legal definitions of death? How do we know when it is time to "unplug" a loved one? Why do we spend so much of our resources fighting death? What are the implications (for our economy, our resources) of a longer-lived population.