It is one of Asimov's series of stories about the Black Widowers, a gentlemen's dining club that meets monthly to solve mysteries and puzzles.
It was first published in the October 1972 issue of Ellery Queen's Mystery Magazine under the title "The Man Who Never Told A Lie", and was included in the 1974 collection Tales of the Black Widowers.
After much questioning of Sand by the Widowers, the club's waiter, Henry, solves the puzzle by observing that "many a literal truth tells a lie by implication."
Without answering Henry, Sand takes his coat and departs, reminding the Widowers that their rules forbid them to disclose dinner conversations outside the club.
"[2] Nevertheless, the story was selected by editor Otto Penzler for inclusion in the 1998 anthology The 50 Greatest Mysteries of All Time.