I have already given you my understanding of the principle and apparently I have been unable to explain it to your satisfaction so at that point you have no option but to look to someone else to explain it to you if you really are interested in learning more.

The particles appearing and disappearing in quantum fluctuations are neither positrons nor electrons.  However you seem happy to accept the principle that positrons and electrons could be opposites so why can you not accept that you can get nothing from something ?:|