(fandom slang) An initially overlooked detail in a story, which, upon further contemplation, is more nonsensical or unrealistic than originally assumed, often to the point of creating a plot hole.

plural of login wall

(informal, Internet) A website notification that prevents an unregistered visitor from viewing any content until signing up or opening an account.

A logic that is not classical: one that extends or deviates from classical logic.

propositional logic