At one point in Season 5, Episode 7 of "The Big Bang Theory," titled "The Good Guy Fluctuation," Leonard (Johnny Galecki) asks out a patron of Stuart's comic book store named Alice (Courtney Ford). She reciprocates his interest, and Stuart congratulates Leonard for supposedly being the first guy to successfully ask out a woman in his comic book store.
As one user pointed out in a Reddit thread about this scene, however, this is not only untrue, but the last time viewers saw a man pursue a woman romantically in the comic book store was none other than Stuart asking Penny (Kaley Cuoco) on a date. The thread goes onto argue that, beyond a simple continuity error, this claim retcons the earlier, more confident version of Stuart in order to accentuate the patheticness that comes to define his character as the series progresses.
When the writers of "The Big Bang Theory" decided to nullify Stuart's past romantic success, then, they went one step beyond their normal approach and outright pretended like the prior, confident incarnation of the character never existed, overwriting a version of Stuart many viewers happened to enjoy.
