The Answer To This Question Is?
Person A's answer to this question is 0.
Person B's answer to this question is not 1.
Person C's answer to this question is 2.
Person D's answer to this question is not 3.
Given that there is only one correct answer to this question, how many of the people in the dialog above is/are lying?
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1 solution
The answer to this question is the number of persons lying.
1.- If the answer was 0, then person C (1 person) would be lying (this is a contradiction = impossible).
2.- If the answer was 1, then people A, B, C (3 people) would be lying (this is a contradiction)
3.- If the answer was 2, then only person A(1 person) would be lying (this is a contradiction)
4- If the answer was 4, then only people A,C ( 2 people) would be lying (this is a contradiction)
Hence, the only possibilty is to have 3 people lying, and in fact, this is happening (A,C,D is lying and B is telling the truth)