(One must amdit to wondering where on Earth the editors of Ellery Queen’s Mystery Magazine came up with some of their titles.)

How to distinguish a non-smoker from a experienced smoker just faking it?

As with many of the Black Widower stories, the actual motivations behind the puzzle are relatively unimportant—a personnel manager leaves out a pack of cigarettes when interviewing people to see how they react to them and was astonished when this technique failed him on a significant occasion. The puzzle itself is relatively interesting and possible for the reader to solve from the facts presented without being too obvious. It’s a pleasant read.

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