TASK DEFINITION: You will be given a trivia clue, and the category it belongs to. You should answer with the best answer that belongs in the category and is described by the clue. For consistency, answers should be in all lower cased letters.
PROBLEM: Category: CURRENT EXPRESSIONS 
Clue: If you're engaging in wishful thinking, you may want to perform this type of "check"

SOLUTION: a reality check

PROBLEM: Category: WHAT ARE YOU AFRAID OF? 
Clue: Papyrophobia is the fear of this--touching it, seeing it, being cut by it

SOLUTION: paper

PROBLEM: Category: PLUMBING 
Clue: Doing this to a pipe, unlike doing it to a needle, involves special cutting tools

SOLUTION:
threading

