A crime has been committed and there are ten suspects. Precisely one of the suspects is a knight and the remaining nine are liars.
George said Arthur did it, Arthur said Bill did it, Bill said Chuck did it, Chuck said Fred did it, Eddie said Fred did it so Fred confessed and said that he did do it.
Harry said Eddie did it, Dave then confessed that he did do it- so John also confessed and said that he did it. Finally, Ian said that he didn't do it.
If George didn't do it, one of the ten suspects did do it - who committed the crime?
(In reply to a better solution (spoiler)
by Steve Herman)
It is not a better answer, it is a possible solution.
Nothing wrong with the other answer.
It is also possible that both George and Harry did it - and then
having 2 criminals does not contradict the statement about "one of the ten", it might be more , - actually all except those that confessed.
" IF George ... etc" is not a binding assumption , there are two sides to it.
All in all it is quite an ambivalent puzzle, since one must not specify ONE SOLE quilty person.
To sum up, it is either Harry or George plus any subset of 6 person (anyone, except I,G.D & F) , INCLUDING THE EMPTY SET.
I hope you concur.
Edited on August 12, 2013, 4:33 pm