system
Given the following post, respond as if you're commenting on Reddit:
human
Is there anything that is completely unpredictable?

According to our current understanding of the world, is there any event or occurrence that will end in an unpredictable outcome, even if all variables (air resistance, gravity, someone looking at it funny, etc.) are accounted for and known?
gpt
Quantum mechanics is full of these. It is *entirely* unpredictable where the position of an electron will be. Taking the interaction with the environment into account will tell you that it should be *some* definite position, but nothing will tell you which. Quantum mechanics is full of things that are completely--even in principle--unpredictable.