The Princess Bride is the quintessential feel-good family film. Along with an eponymous novel that served as its source material, the movie tells a fantastical story of a couple in love who must overcome many dastardly adversaries to live happily ever after. As one of a whole bunch of funny and heartwarming '80s movies, The Princess Bride is the ideal film to watch with kids or a date, thanks to its romantic themes. The film's fantasy setting combined with its cult following makes it perfect for speculation fodder. Since the film's 1987 release, there has been no shortage of The Princess Bride fan theories.
These range from the importance of the film's famous three-word phrase (as seen in the "as you wish" fan theory) to the argument that Prince Humperdinck did ultimately triumph, despite the film's optimistic ending. In the "Dread Pirate Roberts grandpa" fan theory, some speculate that the senior man telling the story could be more significant than the viewer initially believes. Remember to vote up the arguments that you think are most believable, and vote down those that are inconceivable.
Anyone who has seen The Princess Bride is familiar with how many of the characters have nonsensical or exaggerated voices. The reason for this, according to Redditor /u/Stuckinthevortex, is the grandfather is performing these roles as the grandson imagines the scenes in his head.
This would also explain why the assistant of the person with albinism has an accent that appears to change. The original voice was too difficult to maintain, so the grandfather had to alter his performance to finish the story. There's some evidence for this in the way the assistant coughs before his voice changes, perhaps indicating that the grandfather was clearing his throat before modifying how he spoke.
While The Princess Bride mainly focuses on Westley, Buttercup, and Prince Humperdinck, a number of intriguing side-plots occur within both the book and movie. One of these centers around dueling rogue Inigo Montoya and his quest to get revenge upon the six-fingered man who slew his father.
He has rehearsed the confrontation thousands of times, and when he finally encounters Count Rugen, he is ready to exact his vengeance. However, as Redditor /u/mrhorrible points out, when the actual duel with Tyrone Rugen arrives, Inigo soon finds that his opponent doesn't follow his plans. This is why Inigo instructs Rugen on what to say once he has the count in his clutches - he wants to deliver his prepared line.
Several times in both the book an film, Vizzini gets referred to as incredibly clever. Yet, the audience is left thinking that he is something of a fool - or at least incredibly arrogant - for taking part in a battle of wits with Westley. Redditor /u/magrippalfcos suggests that Vizzini took part in the game not out of arrogance, but because he saw it as the only possible path to survival.
By this point in the story, Westley had already defeated a legendary swordsman and a giant, meaning he could have easily defeated Vizzini in a physical fight. While the battle of wits left Vizzini at a disadvantage, it was the best chance he had to survive the encounter with the Man in Black, especially after Vizzini switched the goblets when his opponent was distracted.
The entire purpose of Prince Humperdinck's plan in both the book and film versions of The Princess Bride is to start a conflict with the neighboring nation of Guilder. The most efficient way to do so is to have Buttercup kidnapped so he can blame Guilder for the deed.
By the story's close, nothing prevents Prince Humperdinck from carrying out this plan. Redditor /u/Willmatron explains that Buttercup and Westley's escape from the castle is the only significant plot development. This still leaves the prince in the position to claim Guilder absconded with her and thus incite a conflict between the countries, especially considering Guilder could be at fault for the demise of his right-hand man.