system
Given the following post, respond as if you're commenting on Reddit:
human
[Quantum Mechanics] How does the true randomness nature of quantum particles affect the macroscopic world ?

**tl;dr How does the true randomness nature of quantum particles affect the macroscopic world?**


**Example :** If I toss a coin, I could predict the outcome if I knew all of the initial conditions of the tossing (force, air pressure etc) yet everything involved with this process is made of quantum particles, my hand tossing the coin, the coin itself, the air.

So how does that work ?

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*Context & Philosophy : I am reading and watching a lot of things about determinsm and free will at the moment and I thought that if I could find something truly random I would know for sure that the fate of the universe isn't "written". The only example I could find of true randomness was in quantum mechanics which I didn't like since it is known to be very very hard to grasp and understand. At that point my mindset was that the universe isn't pre-written (since there are true random things) its writing itself as time goes on, but I wasn't convinced that it affected us enough (or at all on the macro level) to make free plausible.*
gpt
Not sure if this answers your question, but one example that comes to mind is nuclear decay.  Quantum effects dictate when any specific radioactive isotope decays and yet the effect is powerful enough to affect the macroscopic world.  For example, a single decay at the right time and place could, and probably has at some point in time, mutated the DNA of a developing organism thus triggering an entirely new line of evolution that would never have occurred if that random quantum event had never taken place.