Hearing it would set an idea of what the person(s) is feeling.
Explanation:
Because, the English Language has so many complicated word connections (ex. syn., ant., etc.). For example, "Why would I do that? You could take it as a defense to an accusation or you could take it as sarcasm. There are so many differentiations in our language and thats what makes it the most complicated.
Closing:
I hope this helped. I could go on and on but then i might not be in time for you to get credit.