Monozygotic twins started life as a single fertilized egg that splits during development. However, the "soul" was magically inserted into the zygote at the moment of conception (i.e. as soon as the sperm penetrated the egg). So, a few divisions after conception the split occurs and suddenly we have what? Do the zygotes split a "soul". Does one zygote keep the soul and the other is shit out of luck? Somebody help me out here, I'm confused!!