"I think (…) that a theory cannot be produced from results of observations, but only from an invention." "I am not ashamed to put the concept of «real state of a physical system» ["existing objectively, independently of any observation or measure, and that can in principle be described through the means of expression of physics"] at the very centre of my meditation." Albert Einstein 1 "(…) It is interesting to speculate on the possibility that a future theory will not be intrinsically ambiguous and approximate. Such a theory could not be fundamentally about «measurements», for that would again imply incompleteness of the system and unanalyzed interventions from outside. Rather, it should again become possible to say of a system not that such and such may be observed to be so, but that such and such be so. The theory would not be about observ ables, but about « be ables»."