De Bono talks a lot about provocation as a means, for example, of deliberating provoking something impossible just to provide a new perspective. For example, when trying to design a car that’s better for passengers you might provoke with something like, what would a car look like that didn’t go anywhere. Of course, you probably need the car to go somewhere, but it might lead to an idea that the doors needn’t be at the side, that the roof might change height, or that you could plumb it in. It may lead nowhere. Then again, it may lead to something new and interesting in the next step.
In case you missed the previous posts, Fundamentals of Lateral Thinking: