Corrected entry: When Penny and Leonard are talking to Sheldon about their date, Sheldon refers to Schrodinger's Cat, stating "The cat in the box is both alive and dead, until you open the box and find out." Yet the precise point of the Schrodinger's Cat example is that the cat cannot be both alive and dead. Schrodinger was arguing against physicists of the time who claimed that certain subatomic particles were special and could be in opposite states at the same time; his argument was that you can't make small systems special because a large and obvious system (e.g., the cat) could always be made to depend on the state of the smaller one, and for a large and obvious system to be in opposite states simultaneously is ridiculous. Now, this is pretty obscure and the misunderstanding of Schrodinger's Cat experiment is widespread, but this is Sheldon we're talking about.
Correction: This is not a factual error on Sheldon's part. He explicitly says that Schrodinger's experiment was an attempt to explain the Copenhagen interpretation of quantum physics, which implies that the cat could be both dead and alive until the box is opened and observed. While he doesn't explain that the point of the experiment was to critique the prevailing thought of the time, his overall point to Penny fits within the context as given.
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.
Corrected entry: Penny doesn't know who Stan Lee is in this episode, though earlier in the series she not only knew who he was but met him at the Cheesecake Factory and had him sign a napkin for Sheldon.
Correction: The signed napkin (from s02e11 "The Bath Item Gift Hypothesis") was from Leonard Nimoy (who played Spock) who Penny met at the Cheesecake Factory, not Stan Lee.
Corrected entry: When they're driving back from Arianna, the road is a stupidly big bend for several shots, then the shot changes and it's suddenly straight and a much lighter tarmac.
Correction: After Amy says "How could you leave like that without saying goodbye and then call Leonard instead of me", and the shot changes to Sheldon looking at Leonard and then back to the three of them, it can be seen in the background that at the turn, the tarmac quality actually changes. Thus it is originally there and the footage is continuous.
Correction: She had already called them before we (and Sheldon) see her struggling with her door.
Correction: Flying from CA to New Jersey isn't a straight flight, his plane was different because he caught a connecting flight.
Corrected entry: When Leonard and Leslie are talking about assuming a relationship, in the cafeteria, the angle of the straw sticking out of Leonard's soda can continually changes throughout the whole scene.
Correction: This is due to the multiple camera angles used in the scene. The straw doesn't change angle.
Corrected entry: When Raj and Howard are trying to decide whether to accept Col. Williams' offer, they can't think of any lawyers to ask for help with potential legal issues; they both seem to be forgetting that they do know a lawyer: Raj's sister Priya.
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.
Corrected entry: Penny's father says, "I want grand kids before I die, and I want them to grow up in a house without wheels," but in season 2, E20, Penny asks Leonard to buy a comic book for her 13 year old nephew. Her nephew would be her father's grandson.
Correction: Her mother may have had a child with another man before marrying her father, which would make the nephew a step-grandson and not a "real" one in her father's eyes.
Corrected entry: When Sheldon comes to tell Leonard and Penny his perfect joke he is wearing a plain green T-shirt, but when Penny leaves and he begins to tell Leanord about it, his shirt now has a black symbol on it.
Correction: The symbol is there the entire time. It's just very difficult to see.
Corrected entry: After the opening credits, Penny walks into the room talking about a doctor she's not been able to see, saying "I've been trying to get him for months". A few seconds later she says the doctor is a woman.
Correction: Penny says "I've been trying to get in for months."
Correction: No, he's right - 2cm x 2cm (for example) would be 4 sq cm. 2m x 2m (200cm x 200cm) would be 40,000 sq cm - off by a factor of 10,000.
Corrected entry: Bernadette says the thing she loves most about Howard is his chest hair to which the other girls say "he has a hairy chest?" and she replies "Nope, just one" but a few episodes later they are in bed and Howard has a full chest of hair.
Correction: She's just making a joke.
Corrected entry: At the end of the episode, Sheldon runs off to Texas. That would be impossible in the short time frame the episode was set in. Especially since they live in Pasadena, California. California is 18 hours away by car from Texas. It has also been stated previously that Sheldon dislikes cars and airplanes a lot.
Correction: Just because he dislikes planes, doesn't mean that he will never go on one, as proven by him traveling by plane to Texas with Howard.
Corrected entry: When the guys are locked in the basement, the door hinges are on their side. You would think a theoretical physicist, experimental physicist, astrophysicist, and NASA engineer could together figure out to simply take the pins out of the hinges.
Correction: It's not that they couldn't do it. It's that they're in a room full of stuff they find awesome. They're having too much fun to try that hard. They don't care if they get out.
Corrected entry: It's revealed that Sheldon rents out a storage unit that contains literally everything that he has ever owned in his lifetime. How is it that nobody else has ever known about this? He doesn't drive, nor does he take public transportation, and we can assume that he must make regular trips there to store any item that he no longer needs/uses. So he would surely need to be driven there by someone, most likely by Leonard, and he obviously couldn't keep it a secret as to why he needs to go there.
Correction: While Sheldon does not like public transportation, he does take the bus when needed. There are numerous mentions of "bus pants" and "bungee cording himself to the seat" to prove he will take a bus when he has to.
Correction: Although no alcohol is shown onscreen, it doesn't necessarily mean he hadn't already drank any alcohol already. There's nothing there to say whether or not he quickly had a drink before the ceremony, off-screen, whilst they were setting up on the roof.
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.
Corrected entry: Several times throughout the show, Leonard makes reference to having sleep apnoea, a condition where the airways close up when you are asleep and you stop breathing for periods of time before your body's reflexes kick in and wake you up. However we also see him sleeping numerous times but he doesn't have any form of cpap (Continuous Positive Airway Pressure) machine. This is vital for anyone who has sleep apnoea as it pumps air into the users airways via a nasal cannula or face mask to keep the airways open and stop the user from stopping breathing. Since sleep apnoea in the most extreme cases can cause death (depending on type of sleep apnoea) a cpap machine is vital and should be seen whenever we see Leonard sleeping or in bed.
Correction: There is no mistake simply because he chooses not to use one (if he even owns one). There are individuals with sleep apnea who don't use them and just deal with waking up in the middle of the night. If Leonard says he has to use a CPAP machine every night and then is seen not using one at night, that could qualify as a mistake, but this isn't the case.
Corrected entry: When using the whiteboard at the beginning, Raj writes "7:11" on the board with a red marker. Later on when Sheldon returns to the apartment with Red Vines, this has vanished from the whiteboard although nobody rubbed it out.
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.