"The answer came back in the jargon it had learned from letters it had seen, and I remember it as if it just happened. 'MR. A LEXINGTON, LEX INDUSTRIES, DEAR SIR: RE YOUR LETTER OF THE THIRTEENTH INST., I AM PLEASED TO ADVISE YOU THAT I AM ABLE TO DISCERN WHETHER OR NOT YOU ARE PLEASED WITH MY SERVICE WITHOUT THE USE OF THE EQUIPMENT PREVIOUSLY USED FOR THIS PURPOSE. RESPECTFULLY, I MIGHT SUGGEST THAT IF THE PUSHBUTTON ARRANGEMENT WERE NECESSARY, I COULD PUSH THE BUTTON MYSELF. I DO NOT BELIEVE THIS WOULD MEET WITH YOUR APPROVAL, AND HAVE TAKEN STEPS TO RELIEVE YOU OF THE BURDEN INVOLVED IN REMEMBERING TO PUSH THE BUTTON EACH TIME YOU ARE ESPECIALLY PLEASED. I SHOULD LIKE TO TAKE THIS OPPORTUNITY TO THANK YOU FOR YOUR INQUIRY, AND LOOK FORWARD TO SERVING YOU IN THE FUTURE AS I HAVE IN THE PAST. YOURS FAITHFULLY, LEX'." * * * * * Peter burst out laughing, and Lexington smiled wryly. "That was my reaction at first, too. But time began to weigh very heavily on my hands, and I was lonely, too. I began to wonder whether or not it would be possible to build a voice circuit into the unit. I increased the memory storage banks again, put audio pickups and loudspeakers all over the place, and began teaching Lex to talk. Each time a letter came in, I'd stop it under a video pickup and read it aloud. Nothing happened. "Then I got a dictionary and instructed one of the materials handlers to turn the pages, so that the machine got a look at every page. I read the pronunciation page aloud, so that Lex would be able to interpret the pronunciation marks, and hoped. Still nothing happened. One day I suddenly realized what the trouble was. I remember standing up in this very office, feeling silly as I did it, and saying, 'Lex, please try to speak to me.' I had never asked the machine to say anything, you see. I had only provided the mechanism whereby it was able to do so." "Did it reply, sir?" Lexington nodded. "Gave me the shock of my life. The voice that came back was the one you heard over the telephone--a little awkward then, the syllables clumsy and poorly put together. But the voice was the same. I hadn't built in any specific tone range, you see. All I did was equip the machine to record, in exacting detail, the frequencies and modulations it found in normal pronunciation as I used it. Then I provided a tone generator to span the entire audio range, which could be very rapidly controlled by the machine, both in volume and pitch, with auxiliaries to provide just about any combinations of harmonics that were needed. I later found that Lex had added to this without my knowing about it, but that doesn't change things. I thought the only thing it had heard was my voice, and I expected to hear my own noises imitated." "Where did the machine get the voice?" asked Peter, still amazed that the voice he had heard on the telephone, in the reception hall, and from the coffee cart had actually been the voice of the computer.