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[ My dad ] died in 2011 and he was the smartest human being I'd ever met, probably the smartest human being that most people who met him had ever met, and to watch somebody that smart lose their mind, lose their brain, lose their ability to know what a fork is or know who I was, was an extraordinary thing to behold. And so I started asking a lot of questions and trying to understand what was it that caused that and how could one prevent that if they could from having that happen to them.