"Earth society is not really well adapted for secrecy," Daneel considers, doubtfully. "There is no privacy to speak of, except that which is pretended. Friendships may exist, of course, but behaviour unusually insular and exclusive of others would be remarks upon. On Spacer worlds, on the other hand, privacy is valued to such an extent that few have intimacies of any sort."

He considers. "In either situation, it's possible but, I fear, unlikely. What precisely were you thinking of?"