Symptoms current knowledge, specifically the lack thereof, cannot explain. The missing ancestor is plural, ancestors the alien extraterrestrial residents of our star cluster, who contributed DNA during the upgrade hybridization process. There was no mating with an unknown whomever.
Since no evidence of this is available at the moment, I am obviously full of excrement. I would enjoy being in the room (cabin) of the building (vessel) when select humans are given evidence and hear the explanation, but I don't expect to be invited. I wouldn't discuss it even if I did, just disclose it anonymously and watch the party.
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