The Grass is Always Greener - S3-E12
Corrected entry: In the episode where Shawn and Cory find out about Turner's Pop Quiz, they are reading Of Mice and Men. In this episode, Eric is asked to turn in a paper on the same book. Very rarely will a school teach the same book in 7th grade and 12th grade literature.
She Loves Me, She Loves Me Not - S1-E13
Corrected entry: Topanga acts like she didn't know Eric was Cory's brother, but in later episodes, Topanga and Cory had known each other for practically their whole lives. How could Topanga have not known about Eric?
Correction: She didn't say "I don't know who Eric is" she probably just didn't recognize him. People can change a lot within a few years.
This correction isn't consistent with the way the scene and episode both play out. When Eric first shows up to talk to Cory and his classmates, Cory and Mr. Feeny both loudly announce his arrival by saying "Eric?" and "Mr. Matthews?" respectively, which elicits no immediate reaction from Topanga. Moments later when Mr. Feeny says "Please class, give Mr. Matthews your attention," a wide-eyed Topanga incredulously responds with "Matthews?", as if she didn't know Cory had a brother, despite Cory and Feeny both addressing Eric when he first arrived. This is further substantiated by Eric, who instead of responding with "Yeah Topanga, it's me Eric. Don't you recognize me?" says "Oh yeah, I'm Cory's older brother. I got the good hair." When Topanga shows up at their house the next day, Eric greets her with "Topanga, right?" and later says she's known him "for like 5 minutes," suggesting they had never met until the day before.
Correction: Mr. Feenie asked Eric to turn in a paper from years ago. He had never turned it in. It wasn't current material.