They

Publication date:1941.04
Genre:Science fiction short story
Preceded by:Beyond Doubt
Followed by:Solution Unsatisfactory
Wikipedia page

“They” is a short story written by American science fiction author Robert A. Heinlein. It was first published in the April 1941 issue of “Unknown Fantasy Fiction.”

Exposition

The story concerns a man who is confined to a mental institution because he is suffering from the delusion that he is one of the few “real” entities in the universe, and that the other “real” entities have created the rest of the universe in a conspiracy to deceive him.