From what I read it was by the Heisenberg uncertainty principle but I don’t understand how, too technical for me when I read up on the topic
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Laplace’s Demon is basically a thought experiment which says if some hugely powerful entity could measure the exact position and speed of every particle in the universe, they could run that through a computer model and exactly predict what will happen in future. Now, it ought to be obvious nowadays there is a massive flaw in this even without Heisenberg–namely, to create the storage to store all this information would require more material than exists in the universe! Heisenberg just adds the cherry on the impossibility cake by telling us that you can’t possibly know both how fast a particle is moving and where it is at the same time, and obviously perfect information about both these factors is critical for Laplace’s demon to work.
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