Baloney Detector (adventures in logic)

A baloney detector is simply a good grasp of logical reasoning and investigative procedure.

The late astronomer and popularizer of science Carl Sagan worried that an epidemic of irrationality is loose in the world. He went on to write about the importance of having a well-equipped baloney detector kit in his book The Demon-Haunted World: Science as a Candle In the Dark.

Baloney detector kit: an excellent stocking stuffer (as is the book).