What are the essential ideas that students need to know about Artificial Intelligence?
Computers are stupid
Do some role playing.
Have students describe how to draw a house, they can not use house words, just geometry words: line, square, triangle, etc.
Get one volunteer to  take a pen to the white board, they don't know what is being described, and follow instructions (I normally take on this role first. I do what they say, but not what the mean).
Dangers of AI
The evil, or not so evil overlords: AI does what it was asked to do. AI algorithms but us into silos, make us vote for trump and brexit, advertise to us, etc.