he explained - although 'explained ' is probably too positive a word , and in this case really means failed to explain but at some length - that it was perfectly possible to travel across the world in a small lamp being carried by one of the party , the lamp itself moving because it was being carried by one of the people inside it , because of a ) the fractal nature of reality , which meant that everything could be thought of as being inside everything else and b ) creative public relations .