I though of it this way too. The problem (and what think disproves this theory) is that when that pair annihilates, it forms a closed loop in time. To surmoun

I though of it this way too. The problem (and what think disproves this theory) is that when that pair annihilates, it forms a closed loop in time. To surmount this, I suppose you could say there are N electrons (where N is still less han the total # observed). Assuming not all loops are closed, this could also explain the electron/positron imbalance (more forward-going strings) as well as quantum entanglement (different instances of the same electron). Experiment to test this theory: allow the positron from a newly created electron-positron pair to annihilate with a second electron. The spin of the two electrons should always be the same.