I recently came across this puzzle here and several others not on Stack Exchange, which seem to follow a common pattern I call "Who did it?" for now.
"Who did it?" does not refer to any puzzle regarding who the culprit was, but rather to a specific format:
- Several people (A, B, C, D, etc.) are accused of something.
- All but one person blames someone else. (A blames B, B blames C, etc.)
- One person (X) does not blame someone else, but rather says "I didn't do it."
- Everyone except one person lies
The outcome always seems to be the case that the person who does not accuse, but rather just denies any involvement is the culprit. Is this always the case? Or are the puzzles I have come across just exceptions?
And if indeed every "Who did it?" puzzle is solved by just pointing at the person who denies any involvement, should these puzzles still be asked - given that they are then just duplicates of each other with different names and a different number of people?