->''"From this point forth, we shall be leaving the firm foundation of fact and journeying together through the murky marshes of memory into thickets of wildest guesswork."''
-->-- '''Dumbledore''', ''Literature/HarryPotterAndTheHalfBloodPrince'', chapter ten

The EpilepticTrees that sprouted during the time between each of the books in the ''Harry Potter'' series could fill over a dozen pages. For the sake of brevity, [[WMG/HarryPotterAndTheDeathlyHallows this link]] includes theories that were either confirmed or {{Jossed}} by ''[[Literature/HarryPotterAndTheDeathlyHallows Deathly Hallows]].'' [[WMG/TheTalesOfBeedleTheBard This link]] is for guesses about the characters within any of Beedle's tales, the artifacts described therein, or Beedle himself.

Also keep in mind that these are guesses about the books. If you have a WMG about the movies, specifically, use [[WMG/HarryPotterFilms the Wild Mass Guessing page for the films]], since with the length of the page a folder would have to be split soon anyway. Do NOT confuse a book character with the actor who plays them in the movie, or the continuity and timeline in the films. The characters were created in the early 1990s, before some of the actors were born. The Millennium Bridge (destroyed near the beginning of [[Film/HarryPotter Film 6]]) wasn't built until after the time of the books' climax. Only the movie version of Lucius Malfoy [[ThrowItIn tried to Avada Kedavra Harry]] in Year 2. [[note]]The actor simply spouted a curse that came to his head, unaware that it was the Unforgivable Killing Curse.)[[/note]]

Due to the huge number of guesses, the WMG pages for the books themselves have been split up into four parts:
* [[WMG/HarryPotterCrossoverTheories Cross-over speculation]]
* [[WMG/HarryPotterRealWorldTheories Real world inspirations and allegorical meaning]]
* [[WMG/HarryPotterRelationshipTheories Relationships (mainly shipping)]]
* [[WMG/HarryPotterMain Other speculation]]