Corrected entry: In the film, Leonard is unable to make short term memories because of his condition. This has only effected him since the incident when he and his wife were attacked. However he is constantly able to remember that he has this condition so he can tell people about it. Surely, he would have no recollection of the doctors telling him about it.
Corrected entry: When Leonard goes back to the Discount Inn to pick up his room key he finds the check-in clerk, Burt, has scammed him into unknowingly renting two rooms. Burt says, "It's not like you're gonna remember it anyway." Then Leonard replies, "You don't have to be that honest, Burt." Because Leonard cannot remember anything due to the short term memory loss, how did he know Burt's name was Burt? It was never said in that scene, he did not have a Polaroid of it and Burt was not wearing a name tag, so how did he know? Possibly there was more dialogue between Leonard and Burt that was cut or it was a true oversight by the makers of the film, either way still a mistake.
Corrected entry: When Leonard is at Natalie's house she shows him a picture of her and Jimmy Grants. In the picture, Jimmy has a mustache. Later, when he gets out of bed and looks at the picture Jimmy doesn't have a mustache in the picture. When he writes "She has also lost someone. She will help you out of pity" on the polaroid of her, he lifts the polaroid up and you can see the picture of her and Jimmy, now with a mustache again.
Corrected entry: In the scene where Leonard has woken up in Natalie's bed, he dresses and as he is leaving Natalie tells him "Lenny, before you go, can I have my shirt back please?" and throws him a blue shirt. He proceeds to take off the shirt he is wearing. It is a dress shirt and the buttons are on the right. Women's dress shirt buttons are on the left.
Corrected entry: Early in the film, Leonard learns that Teddy is the man he has been looking for, but he doesn't realize that he must kill him until after seeing his tattoos. However, when Natalie asks him about John G, Leonard already seems to know that he was the one who raped and killed his wife. If he didn't look at his tattoos, then how did he know what John G was guilty of? Furthermore, if Leonard's wife died after he developed his condition, then how does he know she is dead?
Corrected entry: In the final scene, Leonard closes his eyes to see if the world goes on without him seeing it. While his eyes are closed he has a flash of recall showing him and his wife in bed. On his chest is tatooed "I DID IT", which he obviously removed later. However, he already has "JOHN G RAPED AND MURDERED MY WIFE". We know she was raped, but not murdered, so why does his tatoo say she was?
Corrected entry: Though we never see him waiting, when Leonard calls for an escort to come to his motel he would have to wait until she gets there. During that wait, because of his condition, he should've forgotten what he planned to do later. In the film, we see him call for the escort then in the next scene she's already there and he is explaining to her what he wants. Potential problem solved by editing?
Corrected entry: How does Lenny constantly remember where he parked his car? A great example is when he is being chased by Dodd. We actually see him forget why he is running around the area, but he knows exactly where he parked.
Corrected entry: When Leonard is being chased by Dodd. He pulls his car over into a driveway or alley, and Dodd parks directly behind him (trapping him). Then a chase breaks out and Leonard ends up running back to his car and Dodd's SUV is no longer blocking him in. He's able to just back out and drive away. I believe Dodd was still in pursuit at that point, so when and how did his SUV move?
Corrected entry: In the scene at the film's end, after Lenny has killed Jack G, he has another relapse in memory. He runs outside and sees Teddy, whom he calls "Mister" because he has yet to look at his polaroids again. Yet, later in the scene, Lenny says something about there being $200k in the Jag, without anyone ever telling him. How did he know since he had a relapse after he killed Jack?