Suppose he tries to predict a person's behavior, that's impossible because humans have thoughts.
Someone might be thinking about eating ice cream now, but halfway there, they see a cake shop and decide to eat cake instead.
Although this is a simplistic analogy, it fully reflects one point: the human mind is unpredictable.
As for other things, they can be measured.
Lu Li thought to himself: "I can simulate the weather, natural disasters, or even possible events in the cosmic space over a period by tracking the trajectories of particles, as long as there's no human interference."
Take the weather, for example.
If he simulates predictions through particle trajectories.
Perhaps he could detect that a certain area will rain one or two days later.
But if someone fires a rain-inducing rocket midway, it would disrupt his prediction.
Then, the area where he predicted rain would see no rain.
These are small matters.
