The Big Bang Theory

The Agreement Dissection - S4-E21

Corrected entry: For an obsessive genius Sheldon makes a stupid mistake when he blackmails Leonard into signing a new roommate agreement - any contract signed under duress is invalid. He gains nothing from Leonard signing the new agreement as no other action on his part is required. Effectively Sheldon has got his autograph. Big deal. Leonard is free to ignore the new agreement if he feels like it - and his lawyer was there to witness the fact that he was forced against his will to sign in the first place. This also begs the question of why Priya gets in such a panic about Sheldon blackmailing Leonard by threatening to reveal details of their relationship to her parents - why didn't she just advise Leonard to sign on the dotted line, explaining later that he signed an invalid contract? It would certainly have saved her a lot of grief.

Correction: Priya might have brought the idea of the letter of the law in, but Sheldon has never actually sued anyone for violating the roommate agreement. Leonard abides by it because otherwise Sheldon will become unliveable with. Priya won't give Leonard any more advice because of the risk that Sheldon will tell Priya's parents about Leonard's relationship.

Moose

The Robotic Manipulation - S4-E1

Corrected entry: Howard explains the ease with which he "borrowed" the programmable robot arm thus : "You just have to take it out to your car as if you own it". Howard doesn't have a car - he has a Vespa scooter, and there is no way he could carry the robot arm on that. (While we are on the subject, how does he transport it from Sheldon and Leonard's apartment to his house?).

Correction: His mother very likely has a car (we've heard her say that she's driving back to the grocery store), which Howard very likely used for this occasion.

Knever

Deus ex Machina explanations for errors do not invalidate them. Howard does not have a car and at no time does he mention borrowing one from anyone.

The Bad Fish Paradigm - S2-E1

Corrected entry: When Sheldon mentions to Leonard, Raj, and Howard that he is moving out, Raj asks Leonard "Did you pronounce the 't' in often?" This statement in context implies that it makes Sheldon angry when someone pronounces the 't' in often. However, Leonard and other characters do this multiple times throughout the series with Sheldon never commenting on it.

Ashish_Agrawal

Correction: Sheldon is also very particular about things in certain episodes. It's not out of character for certain ticks to disappear and reappear throughout.

Ssiscool

Correction: The pattern on the teapot suggests that the spots are actually overhead lights in the kitchen. The patterns are constant throughout the scene and the same at every angle whereas crew's spotlights have different placements for different angled shots.

Correction: She had already called them before we (and Sheldon) see her struggling with her door.

THGhost

Correction: This is due to the multiple camera angles used in the scene. The straw doesn't change angle.

Ssiscool

Correction: Raj is whispering to the other two so Penny doesn't hear him.

MasterOfAll

He's not whispering and when he does whisper in front of Penny he covers his mouth.

Ssiscool

Correction: Given how things ended with Priya and Leonard, it probably would have been very awkward for both of them. In addition, she knows far more about Indian law than American law.

Greg Dwyer

It is noted (by Leonard) in a previous episode that Priya is qualified to practice law "in three countries, and your face!" Presumably, as she is there for some time, works for a law firm, etc, one of those three countries is the US.

Correction: The camera doesn't cut from Penny having two hands on the onion ring to just one hand. After Penny picks up the onion ring with two hands, the camera cuts to Raj squealing at her for a moment. She could have easily let go of the onion ring and put her hand down on her lap during this shot.

Casual Person

Correction: There is a red smudge where 7:11 was written. There was enough time for Sheldon to go out get Red Vines, so there was time for him to rub it off when on his own.

Ssiscool

Correction: Penny says "whose head did I just blow off?" This can merely be an expression for killing someone. Not necessarily a literal reference.

Ssiscool

The Pants Alternative - S3-E18

Corrected entry: Sheldon claims the X-Men were named so after the X in Charles Xavier's' name. In The X-Men #1 (1963), Professor X states that mutants possess an extra power that humans do not have. Xavier then says "That is why I call my students... X-Men, for EX-tra power!"

Correction: He may be going by the movie continuity, where the X-Men DID name themselves after Charles. (Likely in an effort to "dumb it down" for Penny).

Captain Defenestrator

It could also have been deliberate on the part of the writers as a set-up for Sheldon's "C-Men" punchline.

Cubs Fan

The Grasshopper Experiment - S1-E8

Corrected entry: Leonard wonders aloud "I wonder who's going to tell his (Sheldon's) parents they're not having grandchildren." Leonard and Sheldon have been sharing the apartment for long enough for Leonard to know that Sheldon's father has been dead for a number of years, but it is at least since S1E04, when Sheldon's mother says "God rest his soul" while talking about his father.

MFWills

Correction: Episode S01E04 ended with Sheldon asking his mother if Dr. Gablehouser is going to be his new daddy and her saying "We'll see." So he could be the other "parent." Or his mother could have met someone else between the episodes.

Captain Defenestrator

The Hawking Excitation - S5-E21

Corrected entry: Stephen Hawking tells Sheldon he made an arithmetic mistake on page 2 of his paper. Sheldon then quickly turns pages on his paper to find the error, but Sheldon turns several pages of his paper, way past the second page, and still finds the error Stephen had noted.

Casual Person

Correction: Scientific papers number their pages differently to how one would assume. There are pages before page 1 begins which are often numbered using Roman numerals. Therefore Sheldon is correct in turning several pages to find page 2.

Correction: It would easy for Sheldon to ignore this fact when he is aboard a train that has been restored to its original design; internally and externally. He has been building toy models since he was a kid. He just wanted to know to what level this train has been restored.

XIII

Except the cars are 1915 Pullmans coaches and the locomotive is an Alcoa FA-4 (built from 1946-1959), so Sheldon should know they never would have had a "link-and-pin" coupler.

Bishop73

Pilot - S1-E1

Corrected entry: At the end of this episode when Penny asks to use Leonard and Sheldon's bathroom for a shower, when she goes down the hallway towards the bathroom/bedrooms, she turns past the bathroom (the door that is visible from the living room) and turns right and goes towards the bedrooms.

Jack Adams

Correction: Penny could simply be going to grab a towel from the linen closet before having her shower.

kristenlouise3

Correction: In most cases, this would be true. But given the way things were set up, he had to pick a new, temporary spot for the practice. It's likely that their living room setup is too complex to change just for a short amount of time, which is why the practice area was set up as it was. Sheldon chose a spot related to the practice area so he would be comfortable, just like he chose a new spot when the gang went to the north pole.

Knever

The Roommate Transmogrification - S4-E24

Corrected entry: Bernadette tells Howard that she chose the premature ejaculation project because neither of them has any heart diseases. However Howard has stated more than once that he has transient idiopathic arrhythmia. Also in the previous episode he actually emphasizes that his family has a history of heart diseases and alludes to a cave painting showing one of his ancestors clutching their chest.

Tanngrisnir

Correction: Transient idiopathic arrhythmia is not a disease, it is a disorder. They are different things.

The Justice League Recombination - S4-E11

Corrected entry: At the end of the episode, when Sheldon imagines going to the Grand Canyon to scream about Leonard, that's not the Grand Canyon, signs not withstanding. The location is Dead Horse Point State Park in Utah (near the town of Moab), with the view looking roughly south into Canyonlands National Park. [GPS near 38°28'12" by 109°44'30".] It's several hundred miles upriver from the Grand Canyon. [At least it is along the Colorado River.] The first national park sign looks authentic, but the small one at the overlook is fake, since that's not the Grand Canyon. And by the way, since it's just after New Year's, there would likely be snow at both the Grand Canyon and Dead Horse Point; the images used are not winter scenes.

Correction: But it's all occurring in Sheldon's mind. He does have an eidetic memory, but if he has never been to the Grand Canyon he can't remember it. He's imagining what it would look like if he were there.

Grumpy Scot

The Nerdvana Annihilation - S1-E14

Corrected entry: At the beginning, when Leonard has won the online auction, we see a shot of his laptop computer screen showing an Apple Safari browser window with Mac OS X window controls, but the laptop is a PC, not made by Apple. Mac OS X can only run on Mac hardware.

Correction: It is difficult but possible (and a TOS violation) to get Mac OS X to run on a PC. The company Psystar even did it commercially. Given Leonard and Sheldon's computer knowledge, it shouldn't be difficult at all. Or they could easily just be running a custom browser skin.

LorgSkyegon

The Pork Chop Indeterminacy - S1-E15

Character mistake: In his conversation with Missy Sheldon makes it clear that his superior intelligence is a result of a random, mutated gene. Since Missy isn't similarly intelligent she obviously isn't carrying this mutated gene (which would be a billion to one shot anyway) so her offspring wouldn't inherit it. Sheldon would know this - his offspring would carry the mutated gene for superior intelligence, Missy's would not. Anyone knowing enough about genetics to use the term 'randomly mutated gene' understands enough to know that the mutated gene would only be expressed in a direct line from the carrier - Sheldon. Also bear in mind he has a model of the DNA molecule in his living room - it is obviously an interest.

Upvote valid corrections to help move entries into the corrections section.

Suggested correction: Genes can be dormant. Which allows them to skip generations. Therefor Missy's children could actually get the "mutated" gene. This is especially true since Sheldon and Missy are twins. Also, since the episode is about who out of Leonard, Howard or Raj, Sheldon would allow to "mate" with his sister, there is the added "insurance" of getting any smart genes from any of the 3 Lothario's mentioned above.

If you are going to try to argue with a geneticist about genetics, please use the correct terms. Sheldon is not referring to a recessive gene - there is no such thing as a dormant gene - he is speaking of a randomly mutated gene. Those are the words he used. If he had inherited a homozygous recessive karotype - one recessive gene from each of his parents - then somewhere in his family tree there would similarly gifted people, in which case he would use the correct term - a recessive gene. If Missy is a heterozygotic dominant karotype possessing the recessive gene for super-genius and the dominant for ordinary intelligence then mating her with Howard, Raj or Leonard would be a waste of time as their dominant genius gene would prevent the recessive super-genius gene from being expressed in the phenotype of the resulting child. The child would be highly intelligent but not on Sheldon's standards. It doesn't matter if Sheldon does not know any of this as he refers several times to a randomly mutated gene, not a recessive one. Missy does not carry the super-genius gene. The posting is correct.

Sheldon is prone to magical thinking when necessary to preserve his obsessive need to control his environment. He may have simply ignored the flaw in his reasoning, as even the most intelligent humans do when venturing outside their ares of expertise. He may be interested in the science of genetics, but his Ph.D. in physics doesn't qualify him as an expert in that field.

More mistakes in The Big Bang Theory

The Extract Obliteration - S6-E6

Stephen Hawking: Do you like brain teasers?
Sheldon Cooper: Oh, I love brain teasers.
Stephen Hawking: What do Sheldon Cooper and a black hole have in common? They both suck. Neener, neener.

More quotes from The Big Bang Theory
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Show generally

Question: How come Raj has no problem speaking to his mother, but, when around other women, such as Penny, he immediately stops talking? Also, why does he have to whisper in someone's ear if he wants to ask Penny something?

Answer: Because Raj's selective mutism seems to be caused by women that Raj sees (on some sort of conscious or subconscious level) as a potential sexual partner. An attribute that wouldn't apply to either his sister or mother.

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