Einstein said Quantum theory wasn't the real thing. Bohr insisted the theory was the final thing. Nature has the last word however. She never behaves the way scientists expect her too.<quoted text>
And yet, Einstein was simply wrong about the predicted results of the EPR experiment. He originally proposed it as an example of the 'incompleteness' of quantum mechanics and thought that 'nature' simply would not agree with the quantum prediction. Well, the experiment was done by Arrow and the results agreed with QM and not with Einstein. Ergo, Einstein was wrong.
The double slit experiment demonstrates this conundrum.
"The formation of the interference pattern requires the existence of two slits, but how can a single photon passing through one slit `know' about the existence of the other slit? We are stuck going back to thinking of each photon as a wave that hits both slits. Or we have to think of the photon as splitting and going through each slit separately (but how does the photon KNOW a pair of slits is coming?). The only solution is to give up the idea of a photon or an electron having location. The location of a subatomic particle is not defined until it is observed (such as striking a screen).
The quantum world can be not be perceived directly, but rather through the use of instruments. And, so, there is a problem with the fact that the act of measuring disturbs the energy and position of subatomic particles. This is called the measurement problem."
There has never been a demonstration to follow the arrival of molecules in two dimensions, in real time. Einstein insisted Quantum Theory was incomplete because he intuited two things: Energy is awareized and the closer you get to non-physical reality, the less likely you will be able to predict anything, which is why the double slit experiment only works with large molecules.