The Bat Jar Conjecture - S1-E13
Corrected entry: When the guys are practising for the Physics Bowl and they are sitting across from Penny, Leonard is sitting in Sheldon's seat, which Sheldon would never allow.
The Nerdvana Annihilation - S1-E14
Corrected entry: At the beginning, when Leonard has won the online auction, we see a shot of his laptop computer screen showing an Apple Safari browser window with Mac OS X window controls, but the laptop is a PC, not made by Apple. Mac OS X can only run on Mac hardware.
Corrected entry: When Howard is showing Penny the online game and Penny expresses interest, Raj says "Smooth", even though Penny is right there - breaking his mutism rule.
Correction: This has never been a diagnosed condition in his case. In Episode 13 of the same season, during a group conversation he accidentally says "good story" with Penny present and immediately realized that he talked in front of a female then covered his mouth. This is just a individual non-medical problem.
Corrected entry: In "The Loobenfield Decay" Sheldon and Leonard go to absurd lengths to avoid having to hear Penny perform because her singing voice is so horrible. But in series 2 episode 18 "The Work Song Nanocluster", series 3 episode 3 "The Gothowitz Deviation" and series 3 episode 8 "The Adhesive Duck Deficiency" (amongst others) she is shown to have a strong, pleasant singing voice, and she sings in front of both men without them objecting. They aren't just being polite - they genuinely like her singing. So, which is it?
Correction: If either of those episodes occurred before "The Loobenfield Decay" episode than this could be a valid plot hole BUT they all occur after. It is fair to conclude that she got better.
The Luminous Fish Effect - S1-E4
Corrected entry: When Penny and Sheldon are driving to the supermarket, Sheldon is explaining the weight of the car and how it affects her braking time. He estimates the car's weight to be 4000 pounds, 140 for himself and 120 for Penny, and then rounds the total up to be 4400 pounds, when it actually should be 4260. It's extremely out of character for somebody like Sheldon to make such a basic addition mistake.
Correction: Or he could be including other things he just failed to mention, such as the contents of the vehicle and trunk.
The Hamburger Postulate - S1-E5
Corrected entry: When Leonard is explaining his thoughts to Sheldon, during the rant which includes him naming who he intends with the words she or her (eg "She: Penny, Her: Leslie), he states, "Indicating that She: Penny had no interest in me asking Her: Penny out," which makes no sense. (00:03:40)
Correction: In most cases, this would be true. But given the way things were set up, he had to pick a new, temporary spot for the practice. It's likely that their living room setup is too complex to change just for a short amount of time, which is why the practice area was set up as it was. Sheldon chose a spot related to the practice area so he would be comfortable, just like he chose a new spot when the gang went to the north pole.
Knever