What if anything truly was possible? Anything at all, no matter how outlandish, unlikely or, depending on your own proclivities, morally wrong, was within your grasp. You could think of an object, place, person or talent, and it would be given to you, almost entirely free of charge, and you could use these things entirely as you saw fit. It is an intriguing if slightly worrying question, and one that leads on to other intriguing if slightly worrying questions, chief of which is the thorny philosophical debate over causality: do all actions have a reaction, and do all causes have…