Dave

Dave recently met you. He found you to be a very open, kind, and good person, not one to hide secrets. Overall, you got along well with him.
One day, you saw an ad for an app that showed how much time someone had left to live. First, you tried pointing at other people. They all had 60-70 years left, or even more. Dave pointed at himself and saw the same thing.
After that, while you were turned away, he pointed his phone at you, and the app didn't display the usual numbers, but this text: "Error. This person should already be dead." That's when he started to feel uneasy.