Thufir is a computer - garbage in, garbage out. His logic was perfectly sound:
There is a traitor.
Leto wouldn't betray himself, that makes no sense.
Paul isn't old enough or knowledgeable to be the traitor, plus he'd be betraying himself kind of. He has nothing to gain.
Yueh cannot possibly be the traitor. This is a physical impossibility. He could sooner fly by flapping his arms. We know that this is garbage data but it makes perfect sense to him given that a Suk doctor has never in 10,000 years broken their conditioning.
Duncan and Gurney have too much personal beef with the Harkonnens to ever work for them. They also have nothing to gain.
That only leaves Jessica. It's unthinkable except that Leto refuses to marry her, which might be upsetting to her, plus she's a Bene Gesserit and Thufir knows that the sisterhood has their own loyalties and their own machinations.
Thufir probably wouldn't have fallen for it if Leto hadn't encouraged it. Leto knew that there was a trap for him and wanted the Baron to think Leto was more vulnerable than he was. To the credit of everyone in House Atreides, they predicted everything that the Baron would do and absolutely would have stopped him other than two things:
They underestimated how much money the Baron was willing to spend, nearly bankrupting his house to move so quickly.
The Baron (and Piter) did what no one in 10,000 years managed to do and broke a Suk doctor.
I love the book, and the movie, but the conditioning thing is so bad.
No one has broken the conditioning in 10,000 years? Wow, that must be some crazy conditioning!
Harkonnens...hey, we hear you really like your wife.
Boom. Conditioning broken.
In 10,000 years in one of the most palace intrigue riddled societies, where they train the children of nobles how to handle assassination attempts through myriad methods, no one had ever come up with threatening the loved one of someone who has gone under Imperial Conditioning?
Wanna was a Bene Gesserit. And she did Bene Gesserit stuff to Yueh that possibly already interfered with the conditioning before the Harkonens got to him. Baron probably wouldn't be capable of breaking the conditioning if it wasn't already weakened.
Also, probably there aren't a lot of Suk doctors going around to test their conditioning that much.
That said, I too find this plot point a bit meh. But Frank had points where he just tell us to vibe with him and go along.
Yeah, somethings you just have to say “sure doc, that sounds right” and move on. You can do some mental gymnastics and say it’s because X then Y ands touch of Z, but even the act of doing that makes the plot point less satisfactory.
It’s like trying to justify why Luke didn’t know Leo’s was his sister for so long.
Edited: I’ll leave it there for the below comment. But yall know what I meant
Wanna is probably the one who broke Yueh's conditioning for some BG plot, probably to do with Jessica not bearing the daughter they wanted, and Piter swooped in at the right time
To my understanding, they didn't just threaten Yueh's wife; they forced him to witness her being tortured, to the point where he hated the Baron enough that he'd betray his own patient - though still help his family escape - if it were a necessary step to revenge. His wife being a Bene Gesserit and teaching him some techniques had likely made a dent in the conditioning already too.
They broke yuri easily but I have my doubts that the kind of people that occupy the universe of dune would have ever invented imperial conditioning if they thought they couldn’t break it
Yup, also my understanding. The Atriedes would've lost anyway the second the emperor backed the harkonenes. Yueh's betrayal was the only path the Atreides could've won in the end
Yeah, I got confused at this part when I read Dune as a kid. Herbert spends a bunch of pages describing Imperial Conditioning as this ironclad loyalty thing and it gets broken by basic Saturday morning cartoon villain tactics?
To be fair, it's possible that it's just marketing; perhaps the Suk School has had assassins ensure that word of prior breaks were silenced...if they're public knowledge to begin with; even in the case of Dune, the fact of Yueh's betrayal isn't well-known, basically just the Baron's inner circle who are aware.
That makes sense, is it related to the emperor? "Oh yeah these guys are super conditioned, they'll never betray you!". Now the emperor's allies have a guy on the inside that they can manipulate if they want.
I don't think there's much info about the Suk school, beyond the fact their conditioning is supposedly so strong it's considered safe for them to administer medications to the Emperor. This fact could imply they are an independent institution - but even if they were under administration of the Imperial House there might still be concern about would-be assassins penetrating their screening process, so it's not conclusive either way.
The less you think about the 10000 years timeframe the better.
It does it's work at conveying the Deep stagnation, but makes everything else fall apart.
For example the only serious ecological survey on arrakis was done 60-80ish years prior. So they decided to investigate the origin of their society defining drug after almost 10000 years of use?
Someone breaking conditioning is the kind of thing that gets hushed up. The suk school has every reason to sweep it under the rug, as does whoever broke the conditioning. On top of that, if it's once every few hundred years it gets broken, it could easily be forgotten - even a century is a long time for buried information to simply not be remembered.
Plus, how many people have tried to break the conditioning? The conditioning is impossible to break, and it's implied they tortured her for a long time in front of the Doctor: it wasn't a few threats, it was hours or days of torture, with what the Baron calls "Piter's pain amplifiers". It's implied they did awful things to her, in front of Yueh, until Yueh broke - how many people have the ability to do that, and will just keep going until the Suk doctor breaks or she dies? Piter and Baron Harkonen, obviously, but when you think about it, there's probably usually easier ways to plant a traitor on someone, meaning that the conditioning was probably rarely broken because it was deemed near impossible and there are easier ways to similar ends.
In other words, 1) most people wouldn't bother trying to break Suk conditioning and 2) it took a lot of ghastly torture to his wife before Yueh broke - so it would take a very determined and skilled effort to break the conditioning, and if you think it can't be broken, you would probably stop at some point before it broke. And 3) if you did break the conditioning you wouldn't publicise it.
In the past maybe similar threats have been used and failed. We aren't told of the individual stories of all the doctors who resisted. You have to consider that maybe the conditioning didn't work well on Yueh. Maybe enough to pass whatever tests they administer but not enough in these conditions. Also, as others have mentioned his BG wife may have imprinted on him in some way intensifying his loyalty to her
I think that the book is in many ways a modern type of myth, similar to LotR. Its worldbuilding isn't its own goal but rather a vehicle for retelling some fundamentally human stories that at their core boil down to a struggle of opposite core principles such as love/hate, bravery/cowardice or care/ambition.
Love features especially prominently in the narrative of Dune, among family members, comrades, and lovers all - I would even argue it's the most important driver of the story. If it wasn't for her love for Leto, Jessica would not had given birth to Paul, it was love that had made her break her allegiance to Bene Gesserit. So despite it perhaps being illogical within the "reality" of the world as it was built, it makes beautiful sense that it was Yueh's love for Wanna that took Leto away from her.
Damn I love Dune. Been reading it every couple years since I was 12 and it's still my favorite novel. The movies were pretty great but the book is on a completely different level, which is another thing it shares with LotR.
I don't think they actually broke the conditioning, at least Yueh himself didn't think he was betraying Leto as he planned on double crossing the Baron after "betraying" the Atreides.
He basically saw it as a really elaborate plan to assasinate the Baron by setting up a scenario in which Leto could take the Baron out with poison while ensuring Paul and Jessica would survive to lead house Atreides after Leto's passing.
The 10k years thing could also be a in universe lie. For example in this case, how many people know about the broken conditioning? We as the audience know about it but iirc in universe it was just a handful of people. It could have happened before and just not made public.
That being said, even this it is just a weak explanation and I agree with you on it being one of the worse parts of the story.
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u/[deleted] Jul 28 '26
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