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- Dec 4, 2017
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One of the characters travels back in time and sleeps with his grandmother, thus becoming his own grandfather. The loop exists and works.
Not that Futurama should be the source of any intelligent conversation or theories!
Then there is Heinlein's classic All You Zombies.
A baby girl is dropped off at an orphanage. Unhappy and lonely as an adult, she meets a young man and becomes pregnant. He vanishes. At the hospital, in labor, the doctors realize that she is a true intersex, one with both sets of organs. They save the baby but are force to make a choice and surgically leave her as a man. Then the baby is kidnapped from the nursery.Spoiler alert. It winds up that they are all the same individual. There's more to it than just that, of course.
One of Heinlein's better ones, I've always thought. Cute story, but hardly possible.