Lets get a list going of the things that a sane/sober editor would have picked up on in Battlefield Earth. Feel free to add things on and lets see how many there are to find.
#1 Johnny Goodboy used a psychlo learning machine, and learned "Euclidean" Geometry. I guess the psychlos were fans of the ancient Greeks.
#2 The tribes lived in caves in Denver for 1000 years, but one spoke with a heavy British accent.
#3 They had no system of writing any more, but after using the learning Machine that taught him Pyschlo, Johnny knew how to read English
#4 It took the psychlos 9 minutes to defeat the combined armies, navies, air force, marines of the USA, China, Russia, and England etc... but it took 9 minutes for a dozen cavemen to defeat them?
#5 If the psychlos were so smart that they had a learning machine, how come they couldn't learn English, but needed to teach Johnnie their language? Also, the ancient teacher from another alien race spoke to Johnnie in English.
#6 The Styrofoam creatures at the mini golf place looked mighty nice after 1000 years. I guess styrofoam really doesn't biodegrade.
#7 The Psychlos have advance mapping capabilities that allowed them to detect a tiny bit of gold from a earthquake in the rocky mountains, but they couldn't find Ft. Knox in 1000 years. It took cavemen a few days to figure that out.
#8 The library of congress is topped with the capitol dome.
#9 The Psychlos fought a war, albeit a short one with humans with aircraft, yet thought dogs were smart, and humans were unable to operate mining equipment.
#10 The pyschlos taught the most rebellious human to use their flying equipment, which is dumb in and of itself. How did they beat us in the first place? But then, he sneaks off in the craft for a week, cruising to Ft. Knox, Washington D.C., and Ft. Hood, Texas, and they don't notice it or track it with radar.
#11 In Ft. Hood Texas, the rebels arrive 1000 years after humanity was decimated, to find that the power was still on. I guess the military paid their electrical bills way in advance. Not only was the power on, but there were harrier jets with full gas tanks, missiles, and a flight simulator that was still functioning and turned on when they arrived. Oh, and there was a nuclear bomb left out in the open for them to grab too.
#12 The rebels other than Johnny did not get the learning machine experience, but he was able to train them to read English in seven days, he got them enough training time each in the flight simulator for them to learn battle tactics and to fly advanced military aircraft to beat the evil aliens in battle. Let's see. 10's of thousands of air force personnel who trained for years and years were vanquished by the psychlons, but 3 dozen hillbillies with a week of training in English, battle tactics, and flying were able to destroy them without breaking a sweat.
#13 When Johnny is shot with a pyschlo radar gun, he goes through 5 or 6 plate glass windows without getting a cut.
#14 The night they defeat the aliens, Johnnie's hair is all thrashed around and going this way and that, after a hard night of battle, he emerges with clean hair, that is nicely braided in front.
#15 The books in the Denver library were still very readable after 1000 years exposure to atmosphere.
#16 The buildings still had glass in the windows 1000 years later.
#17 Cars were slightly rusted, but still had their original paint job from years ago.
#18 Cars still had air pressure in their tires after a millenium of unuse.
#19 The nuclear bomb had no casing, but the rebels didn't show signs of exposure.
#20 The humans instead of mining the gold, got bars of it from Ft. Knox. I was surprised that John Travolta's character noticed, but Johnny said that they melted it down into bars for them. Yeah, from what foundry near by?