system
Given the following post, respond as if you're commenting on Reddit:
human
[Back to the Future] What would happen if Marty got Lorraine pregnant and had a child?

His mom was super hot...
gpt
A precedent for this sort of thing was set by Phillip J. Fry, who became his own grandfather in a similar case of time travel incest.  His situation suggests that the child might lack a delta brainwave.  This would make the child immune to the attacks of Brainspawn and give him/her a leg up when fighting the Dark Ones.  On the downside, the child might also end up being stupendously dumb and easing picking for the Biffs and Benders of the world.