!!FridgeBrilliance
* [=[AC spoilers]=] In "The Atlantis Complex", Artemis claims that his alter ego is Orion because in the Greek myth, Orion was Artemis' mortal enemy and she summoned a scorpion to kill him. That's completely wrong. One version says that he hunted alongside Artemis until he got bloodthirsty and vowed to hunt every animal on Earth... Think about that for a second, Orion fought ''alongside'' Artemis- And what is Orion hunting? ''Holly's heart''. Why would Artemis not want Holly to know that they are fighting along side each other? Well, considering that it's ''Artemis''... Of course, it could still just be a lack of research, but....
** Most versions of the Orion myth say he was Artemis' lover. This [[HoYay was not lost on the fandom]].
** A lot of versions also say that [[FanDumb Eoin Colfer was actually correct abouut this]]. The myths vary.
* In many time travel stories, when a person is threatened to be erased from existence because interference in the past sets off a chain reaction of events that causes their present selves to not exist, they usually just fade out of existence and reality simply changes along with their vanishing, [[NoConservationOfEnergy with complete disregard for the fact energy cannot be created nor destroyed]]. Eoin Colfer ingeniously demonstrated an obedience to the Law of Conservation of Energy by showing what most likely would happen if you killed your past self while they were in the present a la GrandfatherParadox. You "cease to exist" alright, but reality does not change around you, and "ceasing to exist" equals [[MadeOfExplodium blowing up like a nuclear bomb]].
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* Also not lost on the fandom: That part of the Last Guardian where Eoin Colfer says Trolls are smart.

!!FridgeLogic
* Despite going [[{{Anvilicious}} on and on]] about how [[GreenAesop humans destroy the environment]], fairies are still using gas engines in the first book, and presumably have been for ''way'' longer than the humans have, so ''they'' would be responsible for most of the pollution in the world, not humans. [[{{Hypocrite}} And fairies are supposed to be way more advanced than humans, so they have no excuse - we, at least, are starting to phase fossil fuels out.]] May also be FridgeBrilliance, since the fairies are often shown to be not nearly as superior as they think they are, although this is never stated.
** Well, there are a lot less fairies, so most of the pollution probably is still humans, by virtue of our sheer numbers. There are numerous hints throughout the series that it's a lot less black and white than the fairies seem to think.