I haven’t been on a three-way call this emotionally taxing since junior high school. James is explaining the situation — so many dynamics, so much time urgency — to Rachel, and asking if she thinks it would be workable, while I just nervously try to follow the conversation, crossing my fingers and toes. There’s inevitably going to be heartbreak, but is it possible there could also be a silver lining? So what is this all about? Well, I’m trying to figure out how to donate my 78-year-old dad’s brain. He has advanced dementia and is living in a memory care community. James Watkins is th...