Is There a Slippery Slope?

How often is a prediction that says things will keep going the way they're going right? If your time frame is really short, then it's usually right. But if you go out a hundred years, it's almost never the same. So when you say there's a slippery slope, when are you leaving out for how long? I believe that people start with a conclusion, and they reason backwards. And the reason i think that is because that's the only way we think. Nobody in the world who predicts anything about anything who believes that anybody can predict ten years in the future. That's not a thing.