The Hitchhiker's Guide to the Galaxy Primary and Secondary Phases archaic term for a section of a poem revived by Lewis Carroll for "The Hunting of the Snark"). The original series comprised Fit the First to Fit the Sixth. Fits the Fifth and Sixth were co-written by John Lloyd; subsequent versions of the story omit most of Lloyd's material. The success of the series encouraged Adams to adapt it into a novel, which was based on the first four Fits and released in the second week of October 1979. A slightly contracted double LP re-recording of the first four Fits was released in the same year, followed by a single
What the Tortoise Said to Achilles What the Tortoise Said to Achilles "What the Tortoise Said to Achilles", written by Lewis Carroll in 1895 for the philosophical journal "Mind", is a brief allegorical dialogue on the foundations of logic. The title alludes to one of Zeno's paradoxes of motion, in which Achilles could never overtake the tortoise in a race. In Carroll's dialogue, the tortoise challenges Achilles to use the force of logic to make him accept the conclusion of a simple deductive argument. Ultimately, Achilles fails, because the clever tortoise leads him into an infinite regression. The discussion begins by considering the following logical argument: