“Furthermore, there are weighty voices within science that are not as enthusiastic about the multiverse. Prominent among them is that of Sir Roger Penrose, Hawking’s former collaborator, who shared with him the prestigious Wolf Prize. Of Hawking’s use of the multiverse in The Grand Design Penrose said: “It’s overused, and this is a place where it is overused. It’s an excuse for not having a good theory.”44 Penrose does not, in fact, like the term “multiverse”, because he thinks it is inaccurate: “For although this viewpoint is currently expressed as a belief in the parallel co-existence of different alternative worlds, this is misleading. The alternative worlds do not really ‘exist’ separately, in this view; only the vast particular superposition…is taken as real.”45”