My daughter just recently had an assignment at school where students were required to give a “TED Talk.” The focus was deliberately vague—speak on something for which you are a bit of an expert (by 8th-grade standards, of course), some experience that had a profound impact on your life, or perhaps something you just find meaningful. The topics reflected the kinds of conversations that normally happen in the halls of a middle school: "Why Baseball is the Greatest." "The Value of Studying Math." "Cafeteria Lunch Choices are Horrible." Some were rather surprising. One classmate spoke about his grandpa’s military service. Another questioned the morality of plastic grocery bags. Yet another spoke deeply about his Christian faith. My daughter equally wanted to address something faith-based, but with a particular focus: her Papa’s experience with dementia. Since moving back to Ohio, she's had a front row seat to my dad’s very rapid cognitive decline. This...