I2004 said:
it says nature is actually confirmed as quantum like at the lowest level. It is not. It is subject to interpretation i.e bohn and other determinstic theories of QM
Well, this is not an easy subject, and one has to be careful with one's wordings here! :-) There are no
interpretations of quantum mechanics that are not "quantum like". All interpretations yields the same predictions for any observable quantity. Otherwise they would simply be wrong when compared with experiments.
It is true that some hidden variable-interpretations (like De Broglie-Bohm) allow particles to have well-defined locations at all times. But they are still quantum, they just hide the weirdness somewhere else. (Explicitly non-local guiding pilot-waves for example.)
The uncertainty principle is about expectationvalues of observables, and is therefor independent of which QM-interpretation you believe in. That the uncertainty principle is a fundamental limit of nature and not a limit of measurement technology is well established, and not a matter of personal opinion.
The standard Heisenberg example of a photon disturbing an electron is just an example. It is not the motivation behind the uncertainty principle. As they point out in the article you quote, this example has mislead many people. And their experimental data reinforces the full quantum mechanical calculation, again saying that this is not any bald claim (just a nice confirmation of the true principle).
I think the best way to understand the fundamental uncertainty principle is to think of the double-slit electron interference experiment. We know that any measurement of which path the electron takes destroys the interferencepattern. Also, in the two different paths the electron is deflected a slightly different angle by the wall. So the electron have to transfer different amount of momenta to the wall depending on which slit it goes through. So in principle one could find out which way the electron took by measuring the recoil momenta on the wall with high enough precision. (The wall might for example be very small and thin and suspended on low-friction wheels...) Doing the calculations, it turns out that the precision needed to gain the which-way information is precisely below the Heisenberg limit. Hence, if there was
any way in principle to gain this information, we
could not see any interference pattern!
In this way we see that the uncertainty principle have to be a fundamental property of nature, regardless which theory we use to describe it.
