if everything obeys the law of physics, is it theoretically possible to predict the future accurately if we know all of such laws?

Question

Edit: by predict the future, I mean predict every little event and it’s consequences in future, the human history and everything.

In: Physics

Answer 1

It’s not enough to know just the laws of physics, you need to know the exact position and movement of every individual physical piece of the system. This is actually impossible, due to the uncertainty principle attributed to Werner Heisenberg. The more you know about an object’s position, the less *you are able to* know about its motion, and vice versa.

Think of it this way: you can take a photograph of a ball in mid-air, and you’ll know exactly where it is in he picture; however, you know absolutely nothing about whether it’s moving, or in what direction. If the ball is moving fast (or you have an awful camera), the ball might look blurry or stretched out in one direction: this gives you more information about how it’s moving, but its exact position becomes a little less clear.

tl;dr no, because we can never have enough information to make perfectly accurate predictions.