Imagine you are riding comfortably on a sleek train. You look out the window and see that the tracks end abruptly not too far ahead ... The train will derail if it continues. You suggest the train stop immediately and the passengers go forward on foot. This will require a major shift in everyone’s way of traveling, of course, but you see it as the only realistic option. To continue barreling forward is to court catastrophic consequences. But when you propose this course of action, others – who have grown comfortable riding on the train – say, “We like the train, and arguing that we should get off is not realistic.”