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Two Bank Robbers (Posted on 2003-06-27) Difficulty: 3 of 5
In the city of Enigmamia every person is either a knight or a liar. One night, two robbers managed to break into the Enigmamia Central Bank.

Five men were brought to the police station for questioning. It was certain both robbers were present. To narrow the field, each man was individually interrogated about the identities of the robbers. The results were:

Alex: 1. At most one of Bill and Eddy is guilty. 2. Dave is guilty.

Bill: 1. Both Alex and Carl are guilty. 2. Eddy is not guilty.

Carl: 1. At least one of Dave and Eddy is guilty. 2. Bill is not guilty.

Dave: 1. Exactly one of Alex and Bill is guilty. 2. Carl is guilty.

Eddy: 1. Neither Carl nor Dave is guilty. 2. Alex is guilty.

Which two suspects robbed the bank?

See The Solution Submitted by Brian Smith    
Rating: 3.2500 (8 votes)

Comments: ( Back to comment list | You must be logged in to post comments.)
answer Comment 6 of 6 |
The required solution is summarised in terms of the 
following table:
Individual ....Type....Whether Guilty
Alex..........Knight.... No   
Bill..........Liar...... NO
Carl..........Knight.... No
Dave..........Liar...... Yes
Eddy..........Liar...... Yes

  Posted by K Sengupta on 2007-11-14 04:05:38
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