you're nearly there...! you can only know certain things at certain times, like the location of electrons, spin etc...it all gets rather confusing... the whole probability thing is a strange concept at first. There's places where electrons should be, like..really really..should be, but might not, and others that they just cannot be at all...these theories don't apply on a bigger scale, and i think thats where alot of confusion starts...the microscopic world and the macroscopic are soo different. Atoms don't behave the same way if they're arranged in different ways- surface textures, electronic properties just completely change! you probably saw that on Hawking's master of the universe...10 dimensions mate..10 freaking dimensions!! get your head around that... found this on wikipedia- sums it up quite well: adam