Is pointing out obvious plot holes really on topic? This question has a lot of upvotes, but to me it seems like a candidate for a "Yes, that was a plot hole." and a close vote. Even on the original question on scifi the answer is very discussiony. Kind of interesting, but not terribly useful.
Why don't Marty's parents ever mention how similar he looks to the Marty of 1955?Why don't Marty's parents ever mention how similar he looks to the Marty of 1955?
