Outline Mathematics
Logic Problems
Robbery #3
Here's a problem to tackle:
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"Soon after, there was another robbery," said Scheherazade, and the same suspects - Abu, Ibn, and Hasib - were put on trial. They made the following statements:
- Ibn: Hasib never committed the robbery!
- Hasib: That is true!
- Abu: Ibn is innocent!
"Curiously enough, the actual thief told the truth, but they did not all tell the truth. Which one committed the robbery?
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Solution

Copyright © 1996-2009 Alexander Bogomolny
Solution
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"Soon after, there was another robbery," said Scheherazade, and the same suspects - Abu, Ibn, and Hasib - were put on trial. They made the following statements:
- Ibn: Hasib never committed the robbery!
- Hasib: That is true!
- Abu: Ibn is innocent!
"Curiously enough, the actual thief told the truth, but they did not all tell the truth. Which one committed the robbery?
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(In the applet below, click on the underlined omitted expressions. See what happens.)
Do not forget to check your solution.
References
- R. Smullyan, The Riddle of Scheherazade, Alfred A. Knopf, 1997

Copyright © 1996-2009 Alexander Bogomolny
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