zlacker

>>qqqqqu+(OP)
Bell's theorem. It somehow proves that quantum physics is incompatible with local hidden variables, but I could never see an understandable explanation (for me at least) of just how it works.

>>lpelli+ag
I recommend this book:

https://www.amazon.com/Quantum-Non-Locality-Relativity-Metap...

If you don't want to read a whole book then I recommend this article:

https://kantin.sabanciuniv.edu/sites/kantin.sabanciuniv.edu/...

but the book will give you a much deeper understanding.