When John first began showing signs of dementia, his daughter, Julie, told herself it was typical aging. Everyone forgets things now and then, she reasoned. But when her father started insisting he could still drive safely despite getting lost twice in one week, she realized something deeper was happening. Still, whenever she gently brought it up, he laughed it off. “I’ve been driving longer than you’ve been alive,” he’d say. “I’m fine.” At first, Julie tried explaining the f