The issue focused on whether the machines really do have a "control" over them, or are made to do it by humans who are not directly in charge. The cars might not be able to control their movements, for example, but that might be a safety feature of the software. What about and cars that have a human driver, who is keeping them in the right lane for traffic to pass? A software update could fix that problem. Or, as upstart software developer Arun Sundararajan of