The difference between an chaotic and an non chaotic system is, how small perturbations propagate. In a regular system, you get essentially the same result, eve

The difference between an chaotic and an non chaotic system is, how small perturbations propagate. In a regular system, you get essentially the same result, even if you start from slightly different initial conditions. In a chaotic one, small perturbations will amplify and therefore the system will end up in a very different state from nearly the same initial conditions. ( And if there is an experimental error, then the final state is essentially random.)