Think Blue, Count Two

"Think Blue, Count Two" is a science fiction short story by Cordwainer Smith, set in his Instrumentality of Mankind future history. The story revolves around a psychological trip wire that is installed to prevent an atrocity on a sleeper ship (a hypothetical type of crewed spacecraft).

Originally published in Galaxy Magazine in February 1963, the story was awarded the 1990 Japanese Seiun Award for Best Foreign Language Short Story of the Year.