I read a good passage in a book by James Gleick (spelling?) about quantum theory, and what we actually understand about life (<-- you see that, I'm anthropomorphising already!) at the quantum level. I have to declare an interest at this point, being a physicist myself I'm all in favour of smashing atoms to bits and extrapolating "meaning" from the experimental results - it's fun!
He (James Gleick) talked about oxygen, and how it has eight electrons orbiting its nucleus, which immediately fills the mind with an image a bit like a tiny solar system. However, what's actually going on in the oxygen atom is absolutely nothing like that, and quite what it is like, I'm sure any physicist would tell you is perhaps outside our human imagining at the moment. That's the trouble with being the sort of beast optimised by evolution to run away from animals with big teeth, hit large docile animals on the head with clubs and eat them, and shag. When you're suddenly called upon to understand the world of the very small, words understandably fail.
Sorry, went off the track a bit there! Back to James Gleick. He was making the point that the best we can really say about oxygen is that it has a certain "eightness" about it. In terms of its mass it has a certain "15.9994ness" about it (according to www.webelements.com). In chemical composition with other elements it has a certain "sixness" about it, so that when it combines with hydrogen (which has a certain "oneness" about it) we get two hydrogens to one oxygen, giving a combined "molecule" we'll call it (well, we have to call it something don't we?) with again a certain "eightness" about it. We also know from experiment that when "molecules" attain a state of "eightness" they seem more stable. However we code this into language with words like "orbit", otherwise a conversation between two chemists about oxygen might take quite some time!
It seems to me, physicists (and scientists in general) in my experience are pretty good at understanding the limits of their understanding of nature, and are pretty good at not over-deducing from experiments. Unfortunately I think sometimes the language that physicists use gives the impression that they think they understand what their experiments "mean". I think if you questioned any scientist hard enough they'd eventually admit that all they could really do would be to predict the result of a given experiment to a certain degree of accuracy. But that's extremely useful, and it's enabling us all to use the computers we're using at the moment..
God I'm rambling now! I'm not sure of the point I was making! I'll post anyway...
ig.