TASK DEFINITION: Given a set of five words, generate the word from the set that does not belong (i.e. is the least relevant) with the other words. Words are separated by commas.
PROBLEM: ugly, absorption, vitamin c, fat, thin

SOLUTION: vitamin c

PROBLEM: fair, endure, mild, color, tangle

SOLUTION: color

PROBLEM: unhappy, down, lower, emotional, emotional state

SOLUTION:
lower