Confirmation bias isn’t the same as lying – but it’s what makes you vulnerable to believing lies
Somebody shares a study that confirms their political position, and suddenly they are all about “trusting the science.” Then that same person sees a study that contradicts their position, and suddenly they’re pointing out methodological flaws, asking who funded it, and raising questions about researcher bias.
Same person. Same standards, supposedly. Completely different treatment of the evidence.
This is confirmation bias in action, and it’s probably the single biggest obstacle to clear thinking any human being is ever going to face. Not because it makes people stupid – it doesn’t – but because it operates below the level of awareness and it gets stronger the more intelligent somebody is.
Essays 1 through 5 built up the picture of how your brain actually works. Two systems running in parallel. Mental shortcuts papering over the expensive work. Cognitive ease making familiar things feel true. Priming loading the dice before anyone notices. All of those are about how the brain processes information. Confirmation bias is about what happens when the ego gets involved, and it pretty much swamps everything else.
Stuart Hanscomb lays this out in Critical Thinking: The Basics. His version of it is brutal – the biggest obstacle to clear thinking isn’t that your brain is lazy or that it takes shortcuts. It’s that your brain is desperately committed to proving you were right all along.
Which changes the game.
Here’s how confirmation bias actually works. When somebody encounters new information, their brain doesn’t evaluate it objectively. It evaluates it based on whether it confirms what they already believe. Information that supports existing views gets accepted quickly, often without any real scrutiny. Information that contradicts those views gets subjected to intense skepticism – or just ignored entirely.
The scary part is that nobody notices they’re doing this.
Hanscomb explains that confirmation bias operates below conscious awareness. Nobody deliberately seeks out only the information that supports them. They genuinely believe they’re being objective. Their brain is just quietly filtering reality so they only see the parts that confirm they were right.
Look at how this plays out on a concrete issue. Take somebody who believes renewable energy is the solution to climate change. When they encounter evidence supporting that view – studies showing solar costs dropping, data on green-energy job creation – their brain processes it smoothly. It feels right. It gets filed as confirmation of what they already knew.
But when they run into evidence complicating the view – data on grid reliability challenges, information about rare earth mining for batteries, studies on intermittency problems – their brain immediately starts working overtime. Are these studies reliable? Who funded them? What’s the methodology? Is there a political bias?
And look – those are actually good questions to ask about any study. The problem is that they’re only asking them about the studies that disagree.
That’s what makes confirmation bias so insidious. Somebody can be intelligent, educated, genuinely committed to truth – and still completely trapped inside their own perspective. Their System 1 already decided what’s true based on what they already believed. System 2 isn’t checking System 1’s work. System 2 is building elaborate justifications for why System 1 was right.
Hanscomb makes one more point that’s worth sitting with. Confirmation bias isn’t just about what information somebody seeks out. It’s about how they interpret information once they have it. Two people can look at the exact same data and come away with completely opposite conclusions – both absolutely convinced that the data clearly supports their position.
Remember the coherence trap from Essay 4 – how your brain constructs the most coherent story possible from the available information? Confirmation bias is what happens when your brain decides that the most coherent story must be the one where you were right all along.
This shows up in private life, not just politics. Somebody thinks their relationship is solid, so they interpret their partner’s late nights at work as dedication to their career. Somebody thinks their relationship is failing, so they read the exact same behavior as evidence of growing distance. Same late nights. Two completely different stories, both confidently held.
Here’s the brutal part.
Confirmation bias gets stronger when you’re smart. Hanscomb cites research showing that people with higher cognitive abilities are actually better at confirmation bias. They’re better at constructing elaborate justifications for their existing beliefs. They’re better at finding holes in contradictory evidence. Intelligence doesn’t protect against bias. It just gives people better tools to defend the biases they already have.
One thing that needs to be really clear here – confirmation bias affects everyone. Liberal, conservative, centrist, apolitical. It doesn’t matter. Brain structure doesn’t change based on someone’s politics. Everyone is vulnerable to filtering information through the lens of what they already believe.
But confirmation bias is NOT the same thing as deliberate lying.
When somebody genuinely evaluates evidence but interprets it through their existing worldview, that’s confirmation bias. When somebody fabricates evidence, deliberately misrepresents data, or spreads information they know is false, that’s something else entirely. That’s bad faith.
Confirmation bias creates the opening. Bad faith actors exploit it.
This is where all those earlier essays start to click together. Your lazy System 2 doesn’t want to do the hard work of fact-checking claims that already feel right – Essay 2. So it uses heuristics to quickly sort information as trustworthy or suspicious based on whether it confirms existing belief – Essay 3. Information that confirms the worldview produces cognitive ease, which makes it feel true – Essay 4. Media priming has already softened the ground for certain narratives – Essay 5. And then confirmation bias ties all of it together into a tidy package where questioning your own side actually feels like betrayal.
That’s how propaganda actually works. It doesn’t need to convince anyone of new ideas. It just needs to confirm what they already suspect. Once confirmation bias kicks in, the brain does the rest of the work on its own.
You cannot eliminate confirmation bias.
It’s too deeply embedded in how the brain operates. But it can be recognized, and habits can be built that work against it. Hanscomb suggests a simple practice – actively seek out the strongest arguments against your position. Not strawman versions. Not the weakest defenders. The actual best case the other side can make.
That is hard.
It requires engaging System 2 at exactly the moment every instinct is telling you to dismiss the contradictory information. It requires intellectual humility, which is a polite way of saying you have to seriously consider the possibility that you’re wrong. It requires treating your own beliefs with the same skepticism you aim at the views you already oppose.
Most people won’t do it. It’s uncomfortable, it takes mental effort, and it threatens the coherent worldview that System 1 has already built.
But here’s the question worth actually sitting with. If somebody never seriously engages with the best arguments against their own position, how do they know they’re right? If they only consume media that confirms what they already believe, how are they meaningfully different from the people they think are brainwashed? If they dismiss every contradictory piece of evidence without really examining it, are they thinking critically, or just protecting their ego?
Critical thinking requires being harder on your own beliefs than you are on anyone else’s. It requires recognizing that the information that feels most obviously true might be exactly the information that most needs questioning. Because confirmation bias doesn’t just trap people in existing beliefs. It turns them into easy marks for anyone who knows how to tell them what they want to hear.
Your confirmation bias becomes their weapon.
So yes – cognitive biases affect everyone. Everyone is vulnerable to filtering information through existing beliefs. But that doesn’t mean all claims are equally valid, and it doesn’t mean truth is just a matter of perspective. It means everyone has to work twice as hard to fact-check the information that already confirms what they already think.
Because that’s where people are most vulnerable. That’s where the lies slip through.
The uncomfortable truth is that nobody is naturally objective. Human brains are designed to protect existing beliefs, not to pursue truth. And until somebody accepts that, until they start questioning themselves as aggressively as they question everyone else, they’re just another person in the crowd believing whatever feels right and wondering why everyone else is so damn wrong.
They’re not more biased than you. They’re just confirming different beliefs.
Okay – good talk.