But, I Don t Think is a science fiction novella by Randal Garrett first published in 1959. In an intragalactic empire organized as an aristocracy (from Execs to lowly Sevens) the empire s ships are being attacked in hyperspace by the ships of the Misfits. To shoot a Misfit ship in hyperspace requires a Guesser to predict where the ship will have maneuvered to by the time the weapon beam reaches them. A Guesser is the main character of the story, and while his intuition and precognition are useful, he gets stranded on a planet with no way out. First published in Astounding Science Fiction in July 1959. Total Running Time (TRT): 1 hour, 21 min. Randall Garrett (1927-1987) was an American science fiction and fantasy author. He was a prolific contributor to Astounding and other science fiction magazines of the 1950s and 1960s. He instructed Robert Silverberg in the techniques of selling large quantities of action-adventure science fiction, and collaborated with him on two novels about Earth bringing civilization to an alien planet.