I think we can safely assume that no one understands quantum mechanics.

For those who want some proof that physicists are human, the proof is in the idiocy of all the different units which they use for measuring energy.

I think I can safely say that nobody understands Quantum Mechanics.

'Conservation' (the conservation law) means this ... that there is a number, which you can calculate, at one moment-and as nature undergoes its multitude of changes, this number doesn't change. That is, if you calculate again, this quantity, it'll be the same as it was before. An example is the conservation of energy: there's a quantity that you can calculate according to a certain rule, and it comes out the same answer after, no matter what happens, happens.

It is the facts that matter, not the proofs. Physics can progress without the proofs, but we can't go on without the facts ... if the facts are right, then the proofs are a matter of playing around with the algebra correctly.

The world is a dynamic mess of jiggling things

Science is a process for learning about nature in which competing ideas about how the world works are measured against observations.