12 Times Sheldon Cooper Was Wrong

Season 1, episode 5, "The Hamburger Postulate," Leonard hooks up with Leslie Winkle. Sheldon finds his equations changed the next morning. Leslie fixed his numbers while she slept.

Sheldon angrily retorts that he does not go to Leslie's house to change her work. Leslie responds she has no incorrect work at her place.

Season 5, episode 21, "The Hawking Excitation," Sheldon does Howard's chores. Howard shows Sheldon how to meet Stephen Hawking.

Sheldon meets Hawking at the end. The physicist states the research paper Sheldon sent was not bad. An arithmetic error made it incorrect. Sheldon argues, then realizes his mistake. He faints from sending an error to Stephen Hawking.

Season 3, episode 4, "The Pirate Solution," Raj starts working for Sheldon. They try to solve an equation for dark matter collision spectra. After staring at the formula, they disagree on the math. Raj tries to erase Sheldon's work by calling it incorrect.

Raj quits because Sheldon's condescending behavior is too much. Sheldon arrives at Raj's place. He admits he checked the work and found Raj's calculations correct. Raj points out Sheldon was wrong. Sheldon refuses to admit it, even though he was wrong.

Season 2, episode 20, "The Hofstadter Isotope," Sheldon argues with Stuart about who succeeds Bruce Wayne as Batman. Sheldon gets annoyed Stuart disagrees with his answer.

Sheldon says Stuart is wrong. Being wrong is absolute. Stuart counters that saying a tomato is a vegetable is a small wrong, but saying it is a suspension bridge is very wrong. Stuart proves Sheldon's claim wrong.

Season 1, episode 13, "The Bat Jar Conjecture," Sheldon is kicked from the physics bowl team after dominating practices. He gathers a new team of only work staff to prove he is smarter.

Neither team knows the answer to the hard equation on the last question. Sheldon looks stunned and cannot speak. His teammate, a janitor who was a physicist in the Soviet Union, gives an answer. Sheldon will not accept it; he wants to be the only one who answers.

Sheldon dodges giving his answer. He protests for another question instead. His silence signals the wrong answer. The janitor's response confirms correctness. Sheldon's team loses the physics bowl.

Season 3, episode 2, "The Jiminy Conjecture," Sheldon and Howard argue about cricket species. Howard says it is a common field cricket. Sheldon insists it is a snowy tree cricket.

The two stake their comics. They ask the university's entomologist to settle the bet. Howard is right about his assumption. Sheldon must give over his treasured comic.Flash of Two WorldsSheldon loses his comic after the defeat.

Season 2, episode 18, "The Work Song Nanocluster," Sheldon claims he knows everything about the universe. Penny asks who Radiohead is. Sheldon has no clue. This proves his claim false.

He tries to answer by saying Radiohead is a radio show.

Season 7, episode 10, "The Discovery Dissipation," Leonard proves Sheldon's new element wrong. Leonard tells the Chinese team that faked results used his work. The element does not exist. Sheldon's assumption fails.

When he must take back his paper, the whole scientific community learns Sheldon was wrong.

Season 7, episode 6, "The Romance Resonance," Sheldon finishes finding a new element. He boasts about the accomplishment. Then, he sees his error: he used square meters instead of square centimeters for reaction rates. This makes his calculations wrong by ten thousand.

All his work was wrong. The element's discovery was just a fluke.

Season 3, episode 13, "The Bozeman Reaction," Sheldon fears his apartment was ransacked. He debates the safest place. He decides Bozeman, MT, is the safest.

Sheldon tells friends they face danger. He plans to live somewhere much safer. Upon arriving in Bozeman, Sheldon loses his belongings. He admits he was wrong when moving back to Pasadena.

Season 4, episode 2, "The Cruciferous Vegetable Amplification," Sheldon tries a healthier diet. At night, Leonard approaches him in pain, claiming he is dying. Leonard begins by saying Sheldon must have eaten something odd due to his changing eating habits.

Sheldon insists the situation is serious. Leonard thinks Sheldon has appendicitis. Sheldon screams about his appendix bursting. Later, he discovers the gas came from Brussels sprouts. His belief he was dying was wrong.

In Season 3, episode 1, "The Electric Can Opener Fluctuation," the guys return from the north magnetic pole. Sheldon feels he proved String Theory. Raj and Howard reveal they faked the results. They used static from an electric can opener to make Sheldon think the experiment succeeded.

Sheldon realizes his three-month project is worthless. His belief in the north magnetic pole was wrong. All his work failed.