Welcome to the forum @DoesNotCompute! 
This is a friendly place where you can ask help on levels, report bugs, or just chat with other coders! Don’t forget to read the guidelines if you haven’t yet. Have a great time!
I believe here, you should call the name of the function instead on line 14, I know the hints make a little confusion, but you should stick with what you have.
Hint
sayName is not defined in your code, that’s why it must be arising an error. You should use the function that is already there. Hint: onHear