My conclusion is heaven is universal. Respectfully, how does the uniqueness of each sperm relate to the probability reincarnation? The fact that each sperm fertilizing the egg results in a different individual being conceived, and then maybe born, causes reincarnation to fall in probability. The recycling of consciousness(the theme of reincarnation) is further lowered in probability by the uniqueness of each sperm. Also each sperm, forming a completely different individual than another sperm, creates a completely different consciousness than another sperm would have. How could someone who had died have their consciousness recycled through the genitals of others? Thus, the uniqueness of each sperm( and the randomness of which sperm fertilizes which egg) causes reincarnation to be a less parsimonious explanation of the afterlife than heaven without reincarnation is. Sources: Book Highly Theoretical Differential Equations of the Afterlife
Code My Current Thoughts on the Afterlife