Great clarification:

"From another angle, from that of the subtle body, the new guinea pigs may also be carrying the memory in the form of instinct from the previous life when those animals were the forebears of their current parents. It may be that it is a combination of the new one's memory plus that of their parents, as the old tendencies from the past life is plough into the new format which was inherited from the new parents. This is calculus, not arithmetic."

Another astonishing example in context, a virus: Chicken Pox to Shingles

Most virologues don't consider their subjects as living organisms. They aren't even classifiable as unicellular nor multicellular.

They just represent some elements of pre-life "forms" that can't even reproduce without a host! Click -> Virus