Laws of Conservation?

What do you mean by "Lost"?If energy is lost to "somewhere" else that is not part of the original "isolated" system then, by definition, the original system was not isolated was it?If by "lost" you mean dissappears altogether then yes that would break the law of the conservation of energy.

It is my understanding that rather than a loss virtual particles popping into existence imply a temporary gain.It is also my understanding that virtual particles fully adhere to conservation laws because they exist for times less than the Planck time.However I am talking off the top of my head and, like you, I have probably exceeded the limits of knowing what I am talking about so I could be talking out of my virtual arse and be temporarily violating the conservation of nonsense.Maybe Cavediver can explain? Or I suppose we could try and look some stuff up for ourselves.