10. Independence Day: The computer virus - This movie has so many unanswered questions that one is forced to conclude that most, if not all, really are just plot holes after all. But then there’s the computer virus that Jeff Goldblum uploads into the alien mothership, that is ultimately what allows the humans to defeat the invaders. Ask any software developer, and they will tell you that it is ridiculously hard to write a virus on a PC that works on a Mac, or vice-versa, and those are two computer systems that were designed and built by human beings. The likelihood of being able to successfully write a virus on a human-built computer of any sort that would affect a computer built by telepathic aliens is infinitesimal. Of course, this is an alien species that has managed to travel in huge ships across vast distances but has never invented a clock (hence the countdown timer they use before initiating their attack), so who knows what sort of vulnerabilities their computers might have?
8. Back to the Future: Marty’s parents’ bad memory - Even though Marty is only in 1955 for a week, he plays a pretty pivotal role in his future parents’ lives. It stands to reason, then, that they would remember him pretty well, don’t you think? Now, I’m not George McFly, but most men would probably have a few questions if one of their children grew up to look exactly like a friend from high school that their wife dated briefly.
I haven't watched any of the other movies, but take a look here at Wired.