HW10: Don’t forget to marvel
Just in case you hadn’t noticed, the fact that she and Mary can’t be the same person in the question Which song about Mary does she like? is astounding. In case you’ve been so busy checking features and finding PRO that you haven’t had a chance to observe what an intricate set of (largely correct) predictions this model of syntax is making about our knowledge of language, it might be worth taking a moment just to marvel at it.
Ask your relatives why she can’t be Mary. They’ll be surprised that it can’t, and then if they’re so inclined to think about it, they’re not going to remember ever being taught that.