With the detection equipment available to inspectors it is a fairly simple matter to find out if enrichment has taken place in a facility, how long ago and what percentage it was enriched even if all equipment has been moved. Iran knows this fact even if you science retards do not.
Sure. Inspection work.

Why don't you skip the skepticism and go back to just calling for all out war. If this thing works and Iran does not develop a weapon it will be the biggest disappointment you war loving assholes have had since the last time Bush could not drum up support for a third stupid war. Ten years ago they were telling us that Iran was an eminent nuclear threat, and it was not. The same people are saying the same shit now and you just buy it, no questions asked. Iran will not be able to hide illicit enrichment activities from inspectors unless they just deny access and therefore break the deal.