It usually happens around 8:30 in the morning. A notification pings on a smartphone: "Time for your morning BP medication." The son glances at the screen, swipes it away, and thinks to himself, "I'll hand it to Papa right after breakfast." Twenty minutes later, breakfast ends. Work emails start pouring in. A WhatsApp notification chimes. The notification is already cleared from the lock screen, and the thought vanishes with it. By the evening, no one remembers whether the tablet ...