Sy, Just a quick response as I’m at work 🙂 Thanks for the correction regarding superposition, it is a common error on my part!!! Heisenberg’s uncertainty principle was so intertwined with the creation of Schrödinger’s own theories of Wave Mechcanic’s and his superpositioned cat that I frequently confuse the two. Anyway one detail I’d like to correct regarding your explanation of the uncertainty principle and it’s difference from wave mechanics. Like you Simon I’m not expert so for what it’s worth here’s my attempt to explain my version of the truth. As far as I’m aware the uncertainty is not due to some magical force that prevents measurement of position and momentum. It is actually due to the fact that to measure something requires interaction with other particles, on the macroscopic scale these interactions can be ignored but at a sub-atomic scale they can’t. Therefore it is simply the case that to measure an electron’s position (for example) it would have to have photons (example) reflected off it. This would in turn change it’s velocity and therefore momentum. That’s all I have time for now…….hopefully more later. p.s. We need a Quantum Physicist on the Blog!!!!!!!