Earth, huh? What can you tell me about your Earth? Sounds a little different from mine. As far as I know, we didn't have anything like that.
I'm from Tokyo, but, well, in 2038, everyone was turned to stone. I woke up more than 2,000 years later, and everything was gone.
A bullshit detector? Ha. I guess you could do something like that. Maybe listen to a person's heartbeat and see if it's picking up at all? Don't lie detector tests do that?