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.
The Bakersfield Expedition - S6-E13
Corrected entry: Sheldon says he once borrowed his sister's makeup and ended up with pink eye but he was dressed as a zombie and he won second place. There is absolutely no way his hyper-religious mother would let him dress as a zombie.
Correction: This "mistake" relies on a single person acting in precisely the same way that someone else expects them to 100% of the time. People act inconsistently all the time, often totally at odds with their professed beliefs. This "mistake" is only valid if Sheldon's mother was seen forbidding him to dress as a zombie, and that did not happen.
Correction: How do you know she knew? She might have been out of town, busy that night, and so on and so on. Sheldon is hyperintelligent - he wouldn't put on his costume in front of her.
Sheldon is incapable of deception. And guessing where his mother was at the time is too much of a stretch.
What deception? He didn't tell his mother about a costume he wore, and she didn't find out independently. There is no mistake here.
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.
Shua320
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.
Bishop73
Honolulu Hawaii is served by H1, H2 and H3, all part of the U.S. Interstate system.