Plot hole: When John is painting the doll's face he looks down at a photo printout of Amanda, you will notice the bruising/scratches on the side of her face in the picture. Please take note of her hair, shirt and overall demeanor. Now think back to the first Saw when Danny Glover had Amanda in the interview room. The picture that John Kramer is looking at is a picture taken of her in "that exact" interview, this is strange however considering that the interview took place after she escaped the jaw splinter, so how does John have a picture of her from the future? (00:51:40)
Plot hole: The Death Note that Misa brings to L headquarters is supposed to be fake, but when Light touches it he can see the Shinigami Ryuk.
Suggested correction: Light saw Ryuk after he tried writing a name down in the piece of the notebook hidden in his watch. Since he touched that piece, it makes perfect sense he would see Ryuk as that piece was originally part of Ryuk's death note and wasn't swapped by L.
Plot hole: At the beginning, Bill or his henchman are seen watching the family in the house, which they would have course be doing always. If that is so, then why do they not know about the toy car remote that screws up the video signal in the house?
Plot hole: When Oleg calls Teresa from the pedophile's playroom, he tells her the address of their house: 1456 Owens Park Lane, Hoboken. When Teresa shows up, she tells the pedophile that he called from this apartment, 1456 Owens Park Lane, Apartment 303. Oleg never told her what apartment number he was in.
Plot hole: When 02 is carjacked, he runs after his vehicle for some distance. When he finally gives up, he looks into a nearby alley and sees Coco, the girl who initially marked him for the carjacking. This conveniently moves the story along, but makes no sense. She could not have run that distance so quickly, nor would she have reason to follow him.
Plot hole: Right at the end when Pete calls for the "Hard Car" to evacuate the president, he gives very specific orders as to the evacuation point. Considering he was to be arrested on sight, there is no way he would know any of the security arrangements and they would surely have changed them radically because he was such a senior agent. The Secret Service is constantly changing their security.