Character mistake: The letter from the FBI containing the results of the blood and semen test is filled with numerous typos. First, on the line "Subject: Result of examination requested", the word "examination" is misspelled "examnation." Second, the term "DNA instrumental analyses" has "instrumental" incorrectly spelled as "insrumental." Third, the line "Reference: Letter dated October 21, 1987", has the word "dated" misspelled as "dateed" and the month "October" misspelled as "Octorber." (01:58:35)
Character mistake: When Lisa first seduces Mark, Mark notes "The candles... the music... the sexy dress... What's going on here?" However, there are no candles and there is no music playing at the apartment during the scene.
Character mistake: In the very first scene in the film, the magazine covers are flashing up. There is an article called 'How to get a better bod in 5 days.' If you read the beginning of the article it says 'It Can Done.'
Character mistake: There's no way that using a regular needle and thread to sew up that wound would work the way it's shown. Anybody who knew what they were doing - which John Cusack is portrayed as knowing - would also know that using unsterilized materials and instruments without a sterile field from an uncleaned massive open wound is a great way to kill your patient.
Suggested correction: The main plot of this film takes place inside the head of a murderer with dissociative identity disorder. The fact that stitching up a wound in that matter wouldn't work is irrelevant to the fact that it is how Malcolm is playing out the scenario in his head.
You're making a good point to invalidate a "character mistake", but couldn't the entry be reclassified as a "factual mistake" and stand as written?
Character mistake: The Cadillac is identified by Robby as a '57 Eldorado. It's actually a '57 Series 75 Limousine.
Character mistake: When Michael Caine has to leave in a hurry, he has to leave his belongings behind - two suitcases. When the police arrive, the lead cop tells the lower cop to "take everything", but he doesn't; he only takes 1 suitcase, not 2.
Character mistake: When Cadence meets the group at the airport and Finch comments "you're reading Descartes", she responds by utterly butchering the line "cogito, ergo sum." Odd that a student of Descartes would be unfamiliar with how to pronounce his most famous statement-somewhat analogous to a student of Einstein not knowing e=mc^2.
Character mistake: Remy mentions that the insects are part ant, cockroach and termite. She dismisses the mantis side, which allows it to mimic.
Character mistake: Before using the handgun, Clayton saw that it had bullets in the magazine. Later, his bullets caused sparks and ricochet sounds from hitting concrete and steel when fighting Zack. After Layla accused him of being a double agent, Clayton challenged Burke to explain what's going on, and deflected most of Burke's lies but then seemed most confused - despite his knowledge to the contrary - by Burke's claim that Zack is alive because Clayton's gun was shooting blanks. (01:37:10 - 01:38:35)
Character mistake: The very advanced computer on the plane can't spell, since it infers probabilities that a member of the crew has been "INFECTETED" by the creature. (01:06:40)
Character mistake: When Duddit's mom is packing his lunchbox, she refers to him as "Henry". (01:45:54)