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: chocolate food 
Words: rich, chocolate, fudge, chocolate cake, unwarranted

SOLUTION: unwarranted

PROBLEM: Category: type of rigidity 
Words: rigged, firm, unyielding, streamline, taut

SOLUTION: streamline

PROBLEM: Category: date status 
Words: up to the moment, dastards, current, timely, jetstream

SOLUTION:
jetstream