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 simplicity, answers should be in all lower cased letters.

Category: BABY BOOMER MEMORIES 
Clue: The John Birch Society coined the term comsymp, short for this
communist sympathizer

Category: MATH TERMS 
Clue: The term surd refers to irrational numbers like this number's square root, 1.7320508...
3

Category: THE 3 R's 
Clue: The symbol "y" was once used in place of these 2 letters; hence the word "ye" as in "ye olde pub"

th