Roger Penrose, British mathematician and relativist who in the 1960s calculated many of the basic features of black holes. He notably proved, with Stephen Hawking, that all matter within a black hole collapses to a singularity with infinite density and z
ROGER PENROSE: At the beginning of this debate Stephen said that he thinks that he is a positivist, whereas I am a Platonist. I am happy with him being a positivist, but I think that the crucial point here is, rather, that I am a realist. Also, if one compares this debate with th...