Today my youngest was looking at a diagram of the solar system which included Ceres, Eris, and (now demoted) Pluto.
"Mom," she asked, "Are there eleven planets?"
"No, honey," I replied. "There are....eight planets."
Took me about three seconds to come out with that one. I think it's the first time I've had a practical application of the new count of the planetary system. Of course, nine naturally came to mind first.
Whew. It sure is weird when "facts" you learned are no longer "the facts."