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: type of rigidity 
Words: tough, taut, rough, amalgamated, firm

SOLUTION: amalgamated

PROBLEM: Category: weather 
Words: raining, sunny, fair, ghostly, windy

SOLUTION: ghostly

PROBLEM: Category: food 
Words: meat, integrity, grub, frank, weenie

SOLUTION:
integrity