> No, they preprogrammed how to break down that sentence into individual parts and process each one and how they relate to each other.

If you meant "processing", why did you say "stimuli and responses", neither of which is processing?

Regardless, also no, they almost certainly didn't train it grammar either. Similarly to how you don't teach your 2 year old child sentence diagramming, in most AI like this, it picks it up from examples, not explicit rules.

They did program in basic fundamentals of learning and conditioning though. Much like your human genes programmed into you, since newborn infants already demonstrate reinforcement learning...