- Accidental Innuendo: The author's descriptions of Bill's scheming can easily drift into this territory.He is taking advantage while I sleep. Please, no!
- Author's Saving Throw:
- The entry on "The Love God" emphasises that the love potion's effects are temporary and if Robbie and Tambry hadn't had any legitimate attraction to each other they'd have broken up after it wore off.
- Many fans never bought .Giffany's "death" based on the simple scientific fact that she was in a form of electrical energy at the time and energy can not be destroyed under any circumstance. And sure enough, the entry on .Giffany reveals that she was just trapped in the arcade forever by the burning of her disc rather than killed.
- In the series, useful artifacts like the President's key and Soos's infinite pizza are completely forgotten about. The journal explains why. The key only works on locks that existed when it was made, so (among other things) it couldn't possibly unlock Mabel's trap in "Weirdmageddon 2." The infinite pizza works only for Soos, so all it really does is save him money.
- Some fans thought that Stan getting his memories back happened too fast and was an Ass Pull to give the story a happy ending. The journal reveals that we saw a sped up version of events and that it took a full week to restore his memories, and involved a lot more stimulus than just showing him Mabel's scrapbook.
- Genius Bonus: Ford thought the "Duck-billed Plaidypus" (a platypus with flannel-patterned fur) was a myth until he encountered it himself. The platypus itself was thought to have been a hoax before it turned out to be Real After All.
- Harsher in Hindsight:
- Had Ford not deliberately censored his own journal before hiding it, Dipper would have immediately recognized him as a Pines from his self-portrait ... and, after reading his entries on the creation of the portal, he might not have idolized the Author quite so much.
- Ford's instant rage against Stanley for bringing him back to Earth can be seen in a very different light when it turns out Stanley yanked him away from the Nightmare Dimension just as Ford had cornered Bill in the Quadrangle of Qonfusion.
- Hilarious in Hindsight: With a special edition of the journal having been released, Stan's comment to "Buy it twice!" takes on new meanings.
- The Woobie: We already knew that F, better known as Old Man McGucket within the show, had a tragic backstory, but what we didn't get were descriptions of his anxiety when dealing with supernatural phenomena.
YMMV / Gravity Falls: Journal 3