Who made any end of history or knowledge pronouncements? Where did you read any claims that express 100% confidence? Your argument about what native people saw most strongly supports the idea that we should assume UFOs are natural or human-created, and not fantastical beings from another planet. You’ve brought support for what Carter said, not debate. It wasn’t a “claim”, BTW, it was a third-hand account of an opinion that appears to allow for uncertainty.
