My point is that unless you have some kind of spiritual perspective , a ” spirit” doesn’t exist, so for your theory to hold credence there would have to be an element of spirituality implying an afterlife. The fact you have seen your sister after death or a manifestation of her is by definition ” afterlife” ..what else can it be if it’s continuing on in some form after death?
I don’t really why there must be an afterlife if spirits exist. If you read what I proposed then you would have seen where I said that the fact that she is my identical sister is important in explaining why she still continues to exist after death.
so if she continues to exist after death , how is that not an afterlife?