TASK DEFINITION: Given a category and a set of five words, find the word from the set that does not belong (i.e. is the least relevant) with the other words in the category. Words are separated by commas.
PROBLEM: Category: shady activities 
Words: falsification, fib, invent, fudge, cupcake

SOLUTION: cupcake

PROBLEM: Category: military rank 
Words: sargent, ordinary, captain, colonel, general

SOLUTION: ordinary

PROBLEM: Category: ocean 
Words: whirlpool, water, sea, detests, current

SOLUTION:
detests