Truth Tellers on Tuesdays
This Demonstration generates logical puzzles about three people, A, B, and C, who tell the truth on some days of the week and lie on the others.
This Demonstration is an adaption of one of Raymond Smullyan's logic puzzles.
 R. Smullyan, What Is the Name of This Book?, Englewood Cliffs, NJ: Prentice-Hall, 1978 pp. 33–41.