"About robots?" She seemed quite calm as she said the word.

"You said I don't know as much about them as you do. How do I respond to that?" He paused, then added quietly (knowing he was taking a chance), "That is, without offense."

"I didn't say you didn't know about robots. If you're going to quote me, do so with precision. I said you didn't understand about robots. I'm sure that you know a great deal, perhaps more than I do, but to know is not necessarily to understand."

"Now, Dors, you're deliberately speaking in paradoxes to be annoying. A paradox arises only out of an ambiguity that deceives either unwittingly or by design. I don't like that in science and I don't like it in casual conversation, either, unless it is meant humorously, which I think is not the case now."

Dors laughed in her particular way, softly, almost as though amusement were too precious to be shared in an overliberal manner. "Apparently the paradox has annoyed you into pomposity and you are always humorous when you are pompous. However, I'll explain. It's not my intention to annoy you." She reached over to pat his hand and it was to Seldon's surprise (and slight embarrassment) that he found that he had clenched his hand into a fist.

Dors said, "You talk about psychohistory a great deal. To me, at any rate. You know that?"

Seldon cleared his throat. "I throw myself on your mercy as far as that's concerned. The project is secret-by its very nature. Psychohistory won't work unless the people it affects know nothing about it, so I can talk about it only to Yugo and to you. To Yugo, it is all intuition. He's brilliant, but he is so apt to leap wildly into darkness that I must play the role of caution, of forever pulling him back. But I have my wild thoughts, too, and it helps me to be able to hear them aloud, even"-and he smiled-"when I have a pretty good notion that you don't understand a word I'm saying."

"I know I'm your sounding board and I don't mind. I really don't mind, Hari, so don't begin making inner resolutions to change your behavior. Naturally I don't understand your mathematics. I'm just a historian-and not even a historian of science. The influence of economic change on political development is what is taking up my time now-"