One thing to keep in mind is Rotten Tomatoes isn't a ranking. A movie that gets a 100% rating COULD be just a "good" movie, but not a perfect movie. 100% just m

One thing to keep in mind is Rotten Tomatoes isn't a ranking. A movie that gets a 100% rating COULD be just a "good" movie, but not a perfect movie. 100% just means that every review consider it in a "positive" light. Not that every review thought it was the best movie ever made. The numbers can't really be compared to each other. Another thing to keep in mind is the number of reviewers. 2001 had 70, while Gravity had 306. 2001 had 3 "negative" reviews while Gravity had 10.