Question

When reading mysteries, why do you need to be especially clever?

Answer 1

Answer:

To guess the likely twists and unknowns

Explanation:

Mysteries are unique in that they keep more information from the reader than other genres.  Therefore, readers must be sure to gather the information that is given to be able to guess the information that isn't.  While you won't always be correct, being clever and trying to predict twists will often add to the reading experience.