A very special island is inhabited only by knights and knaves. Knights always tell the truth, and knaves always lie. You meet 6 inhabitants: Avery, Scarlett, James, Logan, Harper, and Jacob. "Harper is a knight or Scarlett is a knight," Avery claimed. Scarlett told you that Harper is a knave. "If Logan is a knight then Harper is a knight" - James. "Scarlett is a knave" - Logan. Harper said that If Jacob is a knight then Scarlett is a knight. "Avery is not a knight" - Jacob. So who is a knight and who is a knave?
Avery is a knight, Scarlett is a knave, James is a knight, Logan is a knight, Harper is a knight, and Jacob is a knave.
(1) Avery is a knight
(2) Scarlett is a knave
(3) James is a knight
(4) Logan is a knight
(5) Harper is a knight
(6) Jacob is a knave
Assume Avery is a knight. No contradiction is found in their claim that Harper is a knight or Scarlett is a knight. Assume Harper is a knight. No contradiction is found in their claim that If Jacob is a knight then Scarlett is a knight. Jacob cannot be a knight, because this would contradict the claim of their own that Avery is not a knight. Assume Jacob is a knave. No contradiction is found in their false claim that Avery is not a knight. Scarlett cannot be a knight, because this would contradict the claim of their own that Harper is a knave. Assume Scarlett is a knave. No contradiction is found in their false claim that Harper is a knave. Assume James is a knight. No contradiction is found in their claim that If Logan is a knight then Harper is a knight. Assume Logan is a knight. No contradiction is found in their claim that Scarlett is a knave.