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Twins (Posted on 2009-01-07) Difficulty: 2 of 5
Alex, Bert, Carl, and Dave are all brothers, with two of them being twins. At least one of them is a knight and makes all true statements. At least one of them is a liar and makes all false statements. And at least one of them is a knave and makes alternating true and false statements. The two which are the same type are the twins. From the statements below, determine who the twins are.

1) Bert is one of the twins.
2) Carl is a liar.

1) Carl is one of the twins.
2) Alex is a knight.

1) I am not one of the twins.

See The Solution Submitted by Brian Smith    
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  Subject Author Date
AnswerK Sengupta2009-01-25 16:37:48
Answer by eliminationrod hines2009-01-07 19:25:40
Solutionelementofsurprize2009-01-07 18:27:38
SolutionSolution with explanationGamer2009-01-07 18:23:57
Solutioncomputer solutionCharlie2009-01-07 16:32:03
SolutionSolutionDej Mar2009-01-07 15:46:50
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