Scientists are curious about what makes people laugh, and they often conduct experiments to find the perfect formula for what is considered funny. Read the passage from one of these studies, then answer the question that follows. In one study, participants viewed two non-word strings . . . that appeared simultaneously on a computer screen, and on each trial had to select the non-word that they perceived to be more humorous.

–"A Scientific Theory of Humor,”
Cindi May

Which extended definition would be most helpful to add to this body paragraph?

Non-words, which are sometimes funny and sometimes not, are becoming more common.
Non-words are series of letters that look and sound like words, but have no meaning.
Non-words have become popular punchlines in modern comedic movies.
Non-words, which have no meaning, date back hundreds of years.