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: weather 
Words: stormy, make the grade, fair, luke, honorable

SOLUTION: honorable

PROBLEM: Category: guitar part 
Words: truss rod, fret, neck, bored, strap lock

SOLUTION: bored

PROBLEM: Category: date status 
Words: postponed, jetstream, detests, current, history

SOLUTION:
jetstream