Harman Patil

A Logic Named Joe

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Language  English
Publication date  March 1946
Author  Murray Leinster
Publisher  Street & Smith
Editor  Eric Flint
3.6/5 Goodreads

Publication type  Periodical
Originally published  March 1946
Genre  Speculative fiction
Country  United States of America
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Published in  Astounding Science Fiction
Media type  Print (Magazine, Hardback & Paperback)
Similar  Murray Leinster books, Speculative fiction books

"A Logic Named Joe" is a science fiction short story by Murray Leinster that was first published in the March 1946 issue of Astounding Science Fiction. The story actually appeared under Leinster's real name, Will F. Jenkins, since that issue of Astounding also included a story under the Leinster pseudonym called "Adapter". The story is particularly noteworthy as a prediction of massively networked personal computers and their drawbacks, written at a time when computing was in its infancy.



The story's narrator is a "logic" (much like a computer) repairman nicknamed Ducky. In the story, a logic whom he names Joe develops some degree of sapience and ambition. Joe proceeds to switch around a few relays in "the tank" (one of a distributed set of central information repositories), and cross-correlate all information ever assembled – yielding highly unexpected results. It then proceeds to freely disseminate all of those results to everyone on demand (and simultaneously disabling all of the content-filtering protocols). Logics begin offering up unexpected assistance to everyone which includes designing custom chemicals that alleviate inebriation, giving sex advice to small children, and plotting the perfect murder... Eventually Ducky "saves the civilization" by locating and turning off the only logic capable of doing this.


"A Logic Named Joe" has appeared in the collections Sidewise in Time (Shasta, 1950), The Best of Murray Leinster (Del Rey, 1978), First Contacts (NESFA, 1998), and A Logic Named Joe (Baen, 2005), and was also included in the Machines That Think compilation, with notes by Isaac Asimov, published 1984 Holt, Rinehart, and Winston.

This story was also published in The Great Science Fiction Stories, Volume 8, 1946 Edited by Isaac Asimov and Martin H. Greenberg, DAW Books, November 1982 ISBN 0-87997-780-9

Listen to

  • A Logic Named Joe, Dimension X (episode #13), NBC radio, July 1, 1950
  • A Logic Named Joe, X Minus One, December 28, 1955
  • References

    A Logic Named Joe Wikipedia

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