David: That is a mathematical nothing And yet it is what we observe.-> David: Again a mathematical energy nothing, is not nothing when the charges add up that way. A negative charge is not nothing, no more than a positive charge, or the force of gravity thrown into the sum. Actually it is not just charges that seem to add up zero ... it is energy in all its forms mass, gravitational etc.-> David: If anything exists it has a cause. Ask any 10-year-old.-My apocryphal ten year old would understand the problems infinite regress.- Ultimately this discussion is about the asymmetry of the "nothing", whether it be Krauss's real one or your imaginary one. Even in your imaginary one ... it is not nothing.