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.
The Excelsior Acquisition - S3-E16
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) whom Penny met at the Cheesecake Factory, not Stan Lee.
The Large Hadron Collision - S3-E15
Corrected entry: The "Hollermus" that Sheldon allegedly makes is not actually a Swiss breakfast dish. It is in fact simply a kind of jam made from elderberries which is quite common in most German-speaking countries. Also, judging by the ingredients on the table (eggs, milk, butter) and the food on the plate, the dish prepared by Sheldon seems most likely to be an omelette with a Vienna sausage, which is in no way traditionally Swiss.
Correction: He actually says Cholermus which is a swish breakfast dish similar to a pancake, I had to find a script online when I first heard it to figure out what it was.
Corrected entry: Professor Crawley states he discovered a new species of dung beetle (named after him) in a rain forest in Borneo. That is impossible - dung beetles do not live in damp climates as the fecal matter upon which they live degrades too quickly when moist. You can find dung beetles in Savannah grassland, semi-arid desert, some lightly wooded areas, but a rain forest? Never.
Correction: Never is a big word. Deltochilum valgum and Oxysternon pteroderum are two examples of dung beetles that live in rainforests.
I'm from Borneo and yes we do have dung beetles here. My family is in the adventure business and we take coleopterists to do research on the dung beetles species found here.
The Electric Can Opener Fluctuation - S3-E1
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.
The Friendship Algorithm - S2-E13
Corrected entry: When Penny asks Leonard how Sheldon met Howard and Raj his answer is a long science answer that means he has no clue. That is incorrect since another episode reveals Leonard met them at school and brought them to the apartment. (00:05:00)
Correction: The answer Leonard gives to Penny is actually a correct scientific statement, and it doesn't indicate that he's clueless. He says "kinda like carbon atoms for a benzene ring, proximity and valence electrons". This is a correct statement. Carbon atoms are small and have 4 valence electrons, i.e., they can form 4 bonds. Due to catenation, carbon atoms have a very strong tendency to bond with other carbon atoms. Similarly, Leonard's statement suggests that they worked at the same place (hence proximity) and they were all seeking friends (valence electrons). Hence they became friends.
Thanks for the correction.
The Bakersfield Expedition - S6-E13
Corrected entry: At the end of the episode Sheldon's sat nav voice asks "Can you name the four state capitals that are not served by the interstate system?" In fact, there are five, according to the Interstate System's website. Juneau, Alaska; Dover, Delaware; Jefferson City, Missouri; Carson City, Nevada; and Pierre, South Dakota.
Correction: Although there used to be 5 state capitals not served by the interstate system, the completion of I-580 means that Carson City is now served, hence there are only four, and the sat nav was correct. 580 was completed in 2012, the episode in question aired in 2013.
What about Hawaii?
Honolulu, HI has an Interstate Highway. Not all Interstate Highways physically go from one state to another, the name just indicates it receives federal funding as part of the National System of Interstate and Defense Highways initially set up through the Federal Aid Highway Act.
Honolulu Hawaii is served by H1, H2 and H3, all part of the U.S. Interstate system.
The Creepy Candy Coating Corollary - S3-E5
Corrected entry: Wil Wheaton tells Sheldon that he missed the convention because his grandmother died. When Wheaton later refers to a living grandmother, Sheldon realizes he has been tricked. He shouldn't - presumably Wheaton, like everyone else, has two grandmothers (mother's and father's side) and thus Wheaton announcing he has a living grandmother in no way contradicts what he said before. This alone shouldn't tip Sheldon off that Wheaton was lying.
Correction: In context of how the scenes played out, it is directly implied (and very obvious) that Wheaton is talking about the same grandmother.
The Excelsior Acquisition - S3-E16
Corrected entry: Penny got a red light camera ticket while Sheldon was driving her car. She says she gave up Sheldon as the driver to the court because she didn't want to get any more points on her license. You don't get points on your license for a camera issued violation. The registered owner just gets a straight fine. A police officer has to issue a ticket at the scene to get license points.
Correction: Penny is not a legal expert. She might not be aware of this technicality and is still afraid of gaining points.
The Parking Spot Escalation - S6-E9
Corrected entry: For being smart they act stupid here. They don't think to alter the days the guys use the parking space with Friday being where they either share it together or Leonard or Raj get it while Howard and Sheldon would each get it two days apiece.
Correction: It's not a stupidity. It's entirely within the personalities of the two friends that Sheldon wouldn't accept change and give up something that is rightly his and for Howard to gloat over that he's a bigger deal than Sheldon now and refuse to give up something given for his new celebrity.
Correction: Sheldon didn't even have a car. Heck, he didn't even have a license. Well, except for a later episode where he secretly had a license that he never used.
This point is made several times in the episode. The fact that Sheldon does not have a car but still agues forcibly for his right to the parking space serves to reinforce the recurring theme of the show, that Sheldon is unbearably eccentric and opinionated but still manages to engage with his social group.
The Long Distance Dissonance - S10-E24
Corrected entry: Dr. Ramona Nowitzki returns and Sheldon introduces her to everyone as if they have never met her but, outside of Amy and Bernadette, they did years ago back in season 2. At the very least Leonard and Penny should remember her. But no-one acts like they do.
Correction: When bringing her to lunch with the other guys, Sheldon specifically says "You may remember Dr. Nowitski" and they reply. They obviously do remember meeting her.
Corrected entry: When Sheldon realises his mistake in reading sq centimeters as sq meters he says "I am off by a factor of 10,000" when in actuality such a mistake would be by a factor of 100.
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.
The Robotic Manipulation - S4-E1
Corrected entry: In a conversation with Penny, Sheldon says "Progidy" instead of "prodigy". Definitely not a mistake he'd make. (00:19:50)
The Precious Fragmentation - S3-E17
Corrected entry: The "ring" prop is alleged to be one used in "The Lord of the Rings" movies. However, the prop used in the TV show has a gold chain, but in the films Frodo's ring is held on a silver chain.
Correction: The chain isn't what's important. It's the ring. The chain is not part of the prop.
The Friendship Algorithm - S2-E13
Corrected entry: When Sheldon and Barry are rock climbing, Sheldon looks down and shouts in fear. When Barry asks "You all right there Cooper?", Sheldon answers "I feel somewhat like an inverse tangent function approaching an asymptote." An inverse tangent function approaches its asymptote in the horizontal axis, not the vertical. (00:15:55)
Correction: The vanity card at the end explains the joke. "A linear asymptote is essentially a straight line to which a graphed curve moves closer and closer but does not reach. In other words, given a function y=fn (x) with asymptote A, A represents a number that, no matter how big (or, given the function, small) you make x, y will never make it to A. The particular example Sheldon quotes is the inverse Tangent function, or Arctangent, which has two asymptotes. If you graph it, it sort of looks like a horizontal S. No matter how big you make x (that is, how far you move to the right [that is horizontally]), the function is never going to hit that top line (π/2), and no matter how small x gets (moving to the left), y is never going to be smaller than - π/2" Sheldon is saying he will never reach the top.
The Geology Elevation - S10-E9
Corrected entry: A person wearing a blue shirt is seen poking out behind the refrigerator for a moment when Leonard is talking. (00:12:55)
Correction: That's Raj wearing a blue jacket getting condiments.
The Pork Chop Indeterminacy - S1-E15
Corrected entry: Sheldon asks Missy why she doesn't tell her friends that he is a toll taker on The Golden Gate Bridge. There are no toll takers on the Golden Gate Bridge. Tolls are paid by credit or debit card, a prepaid account or by invoice to the registered car owner's address. There is no way Sheldon would not know this.
Correction: S1-E15 aired in May, 2008, but the Golden Gate Bridge didn't switch to all-electronic toll collection until March 2013, and the decision to convert to electronic toll collection wasn't made until January, 2011.
Correction: Sheldon was just suggesting that being a toll taker or something of that profession is as ridiculous as her telling everyone he was a "rocket scientist." Even if the statement was indeed true it doesn't affect my point.
The Spaghetti Catalyst - S3-E20
Corrected entry: When Sheldon says goodbye to Howard after walking with him on the street, he says "BYE, SHEL" instead of "BYE, HOWARD".
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.
The Misinterpretation Agitation - S8-E7
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.
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.