Armchair Treasure Hunting: What’s the Difference Between A Clue, Hint, Red Herring, and Rabbit Hole?

Clue, Hint, Red Herring, or Rabbit Hole? When picking up an armchair treasure hunt book, sometimes the most difficult task to making a solution is to decide if something is an intended Clue, Hint, Red Herring, or just a Rabbit Hole. What is the difference between these terms?  And how …