blacknad wrote:
"My question was not really about what is practically possible, but what it theoretically possible."

I know. And my response to you has nothing to do with practicality. It is known to be impossible by any known method. Remember Heisenberg ... it is impossible to know where anything is and also know its speed. You can know one but not both. Ever! Even in theory.

No matter how hard you, or I, or Einstein, might have wished it otherwise.

DA Morgan