I landed on the island of Knights and Knaves where Knights always tell the truth and Knaves always lie. I set out to find their two leaders, Raymond and Martin and I really wanted to talk with Martin.
I found them both at the same time, one in a Red hat and one in a Blue hat but I was not sure who was who and I was not sure which was Knight or Knave or both or neither.
I asked both of them: "Is Raymond a Knight?" Only the one with the blue hat answered, and I can't remember what he said. But I do remember that at that point I was able to tell who was Raymond and who was Martin.
What color was Raymond's Hat?