Laura Fermi wrote:
Leo Szilard stayed several years with the phage group between two periods of intense political activity. Before revealing his interest in the phage, Szilard had visited Luria's laboratory at the University of Indiana. 'Doctor Szilard, I don't know how much to explain,' said Luria, embarrassed by the presence of the great nuclear physicist. 'I don't know what to assume ...' 'You may assume,' Szilard replied promptly, 'infinite ignorance and unlimited intelligence.'