A very special island is inhabited only by knights and knaves. Knights always tell the truth, and knaves always lie. You meet 6 inhabitants: Jackson, Aiden, Emma, Jack, Daniel, and Logan. As Jackson put it, "Logan is not a knave". Aiden commented, "Daniel is not a knave". Emma asserted: "Jackson is a knave if and only if Aiden is a knave". Jack remarked, "Emma is not a knave". Daniel said, "Jack is a knight." Logan noted, "Daniel is a knight". So who is a knight and who is a knave?
Jackson is a knight, Aiden is a knight, Emma is a knight, Jack is a knight, Daniel is a knight, and Logan is a knight.
(1) Jackson is a knight
(2) Aiden is a knight
(3) Emma is a knight
(4) Jack is a knight
(5) Daniel is a knight
(6) Logan is a knight
Assume Jackson is a knight. No contradiction is found in their claim that Logan is not a knave. Assume Logan is a knight. No contradiction is found in their claim that Daniel is a knight. Assume Daniel is a knight. No contradiction is found in their claim that Jack is a knight. Assume Jack is a knight. No contradiction is found in their claim that Emma is not a knave. Assume Emma is a knight. No contradiction is found in their claim that Jackson is a knave if and only if Aiden is a knave. Assume Aiden is a knight. No contradiction is found in their claim that Daniel is not a knave.