Ok this is fucked up to think about. What if in the future we have the technology to send messages to people in the past. Like what if hundreds/thousands of years from now we have the ability to manipulate time or energy, light years..whatever and can send signals to the past. So how would we know that right now we aren't getting signals from the future? Like maybe my great great great X 15 grand children are telling me what's up, and I don't even know it?