It doesn't happen often, but there are times when the one and only Sheldon Cooper (with an IQ of 187) makes mistakes at work, with his friends, and in his relationship. Sometimes he apologizes for his blunders and other times he's too embarrassed. S01E12 - The Jerusalem Duality Dennis Kim, a child prodigy seems to have outstripped Sheldon's achievements in every way. Sheldon decides to give up his own work and focus on other tasks. S01E05 - The Hamburger Postulate Sheldon wakes up to a terrible surprise; the equations on his whiteboard had been tampered with. Although it solved the problem he had, he was still infuriated. Shortly after that, Leslie admits that she had corrected his equations. S01E13 - The Bat Jar Conjecture The gang competes Caltech's Physics Bowl. Leonard made the decision to drop Sheldon from the team and add Leslie Winkle to take his place. S04E21 - The Agreement Dissection Sheldon is frustrated at Priya's nullification of the Roommate Agreement using her knowledge of the law and contracts. S04E18 - The Prestidigitation Approximation Priya feels threatened by Leonard hanging out with his ex-girlfriend Penny all the time. Meanwhile, Sheldon attempts to figure out Howard's magic trick. S03E02 - The Jiminy Conjecture Guys find a cricket in their apartment and each claims it to be a different species. They decide to make a bet before catching it and bringing it to an entomologist at Caltech. S05E21 - The Hawking Excitation Sheldon finally gets to meet Hawking in person. When they meet, Hawking points out an arithmetic error in Sheldon's paper that makes the whole paper incorrect, causing Sheldon to faint. S06E04 - The Re-Entry Minimization Amy and Penny are playing Pictionary against Leonard and Sheldon. Sheldon's drawing concepts and guesses are too complicated and confusing for Leonard and the girls win. #shellypenny #thebigbangtheory #kaleycuoco DISCLAIMER: Pinned comment contains affiliate link. This means that if you click on one of the links and make a purchase, I may receive