Playing Devil's Advocate Leads To Making Better Decisions
Read "Playing Devil's Advocate Leads To Making Better Decisions" on Joseph Kelly's site.
| Metacognition, Understanding, Wisdom | 15 min read
An email sits open on my screen. Someone has asked me to take something on, a small project, maybe a speaking request, maybe a collaboration that sounds interesting on first read. I feel the pull immediately, that quiet tug of curiosity that wants to say yes before I've thought it through. And before I answer, I do something I've done so often it barely registers as a step anymore. I argue against caring.
Not against the project itself. Against my own interest in it. I sit with the question of whether this deserves my attention at all, and I build the strongest case I can for why it doesn't. Why this might be a distraction dressed up as an opportunity. Why the pull I'm feeling might be novelty rather than alignment. I let that case stand for a while before I let myself answer.
This is playing devil's advocate, and most people never think to apply it here, to the question underneath the question. Not "should I do this," but "does this deserve to matter to me at all." I find myself running this exercise more than almost any other, because so much of what pulls at us in a given week, an idea, a request, an opportunity, was never tested for whether it was worth the weight of our caring before we let it take up residence in our minds.
Where the Phrase Actually Comes From
The origin of "devil's advocate" is more precise than most people realize, and the precision matters. The phrase traces back to the Catholic Church's canonization process, where an official called the Advocatus Diaboli was formally appointed to argue against a candidate's sainthood. This wasn't an outsider lobbing criticism from the sidelines. It was an insider, deeply familiar with the case, whose entire job was to surface every weakness, every inconsistency, every reason the candidate might not deserve the honor being considered.
What made the role function wasn't just its existence. It was the actual mechanics of it. The Advocatus Diaboli would study the candidate's life in detail, looking for evidence of human failing, then formally challenge the miracles attributed to them, the testimonies offered in their favor, the gaps between the official account and what could actually be verified. Someone arguing in favor of the candidate had to answer each challenge directly, not in general terms, before the case could move forward. The objection had to be real enough to require a real response. A canonization that survived this process meant something specific, that it had already withstood the strongest opposition the Church could organize against it, not merely that no one had bothered to object.
Here's what makes this origin story so useful. The Church didn't create this role because it doubted the value of canonization. It created the role because it took canonization seriously enough to want it tested. A choice that mattered enough to last forever deserved an advocate whose only loyalty was to the truth of the matter, not to the outcome anyone hoped for.
That's the spirit you inherit when you decide to play devil's advocate today. You're not undermining the choice in front of you. You're honoring it enough to make sure it can hold up.
What Playing Devil's Advocate Actually Means
When you play devil's advocate, you deliberately argue a position you may not personally hold, for the purpose of testing an idea, a plan, or a commitment before it gets made. You're not lying. You're not being difficult for sport. You're stepping into a role, the way an actor steps into a character, and using that role to do something your normal vantage point cannot do on its own: see the other side clearly enough to make its case convincingly.
This distinction matters because devil's advocacy gets confused with two things it isn't, and the difference is easiest to see in the same room.
Picture a team meeting where someone proposes launching a new initiative. The cynic in the room says, "These things never work out anyway," and stops there, having offered nothing the group can actually respond to. It isn't an argument. It's a mood dressed up as a position, and it tends to come from the same place every time regardless of what's being proposed, which is the tell. A cynic doubts everything reflexively, often as a way of avoiding the vulnerability of genuine investment.
The contrarian in that same meeting says, "I just don't think that's the right call," mostly because someone else has already said it's the right call, and being the dissenting voice is the actual point. A contrarian takes the opposite position because opposition itself feels like identity, not because the position has been earned through reasoning.
Then there's the person who says, "Let me play devil's advocate for a second. Here's specifically why this initiative could fail in its first quarter, and here's the evidence I'd point to." That's a different kind of statement entirely. It names the role. It offers something concrete enough to be argued with. And once the test has run its course, that person can say "okay, I think this still holds up" and mean it, because they were never actually opposed to the idea. They cared about it enough to want it tested properly. That's precisely why they were willing to stress-test it.
You might think of it as temporary, purposeful disagreement. You put it on like a coat when you walk into the cold, and you take it off when you're back inside.
Why Your Mind Needs This Exercise
Go back to that email for a moment. The pull I feel toward a new project rarely arrives with evidence attached. It arrives as a feeling, and feelings are persuasive long before they're examined. Within a few minutes of reading that message, I could already feel my mind assembling reasons this was worth saying yes to. This person seems thoughtful. The timing could work. It might lead somewhere interesting. None of those reasons were wrong, but none of them had been tested yet either. My mind had simply started building a case for the side it already wanted to take.
This is the part of you that confirmation bias lives in. Once you've started leaning toward something, your mind tends to filter incoming information in ways that support what you already lean toward, often without your noticing it's happening. This isn't a flaw reserved for careless thinkers. It shows up in careful thinkers too, often more invisibly, because careful thinkers are skilled at constructing justifications that feel rigorous even when they're one-sided.
This is where playing devil's advocate earns its keep. It interrupts the natural momentum of confirmation. It forces you, or someone you trust, to do the cognitive labor your mind would otherwise skip. And the labor isn't abstract. When I genuinely build the case against caring about that project, specific things surface. The assumption I hadn't named, the time it would actually cost against the time I imagined it would cost, the version of my week where this becomes one obligation too many and something more important gets squeezed out to make room for it.
None of this surfaces if I only ask, "Is this a good idea?" That question is too easy to answer with a shrug and a feeling. Devil's advocacy asks something sharper: "If I had to convince myself this doesn't deserve my energy, what would I say?" That reframing changes everything. You're not listing vague hesitations. You're building a case, with reasoning behind it, the same rigor you'd want from someone who actually believed it.
The Clarity This Brings to Decision-Making
Choices made without this kind of pressure-testing often feel solid right up until they aren't. You believed in the plan. Everyone around you nodded along. Then life introduced a variable nobody considered, and the commitment buckled under a weight it was never built to hold.
I think of a version of this I've watched play out around a much larger commitment than an email, someone deciding whether to sign a lease on a bigger space for their growing business. The excitement of the moment makes every reason to expand feel solid, the room finally large enough, the image of what the business could become once it has the space to match the ambition. What playing devil's advocate adds here is the discipline of asking, before signing anything, what the slowest plausible quarter would look like in that space, and whether the commitment still makes sense under that version of events rather than only the best one. Someone who runs that test before signing isn't being pessimistic. They're making sure the excitement survives contact with a harder question before the harder question arrives on its own terms, with a lease already signed and no easy way out of it.
Playing devil's advocate gives you something different. It gives you a choice that has already met its opposition before the stakes became real. You've already asked the hard question in the safety of reflection, before you had to ask it in the middle of a launch, a relationship, a financial commitment, or a creative project you've poured months into.
There's a particular kind of steadiness that comes from this. It's not the steadiness of certainty, because certainty is rarely available to us in any choice that matters. It's the steadiness of having looked honestly at what you were getting into. You can hold a commitment more firmly when you know you didn't just want it to be right. You tested whether it was. I think of this as the difference between a choice that feels good and a choice that's been earned. One is built on momentum and hope. The other has survived its own counterpoint and still stands. Both can lead to the same outcome. Only one of them gives you the footing to follow through when things get difficult.
Playing Devil's Advocate With Yourself
Most people imagine devil's advocacy as something done to them by someone else. But the most consistent version of this practice happens internally, in the quiet space before you've told anyone your plan, or in my case, before I've even replied to the email.
Try this the next time something pulls at your attention and you feel the urge to say yes before you've thought it through. Before you announce anything, before you commit to it, sit with the strongest case against caring about it in the first place. Not a halfhearted list of caveats. A genuine case, built as if you were trying to convince a thoughtful, skeptical version of yourself that this isn't worth your time. Name the actual cost. Picture the week where you said yes to this and regretted it, and ask yourself honestly what led there.
This is exactly what I do with requests, projects, even ideas for my own work that show up uninvited and demand attention before I've earned the right to trust them. I'll sit with a new concept for an article or a tool and ask myself what I'd say if I were trying to talk myself out of it. Sometimes the case against it falls apart fast, and what's left is a clearer, steadier yes than the one I started with. Sometimes the case holds, and I'm grateful I built it before I'd already told someone I was in.
This exercise asks something of you that simple hesitation never does. Hesitation is diffuse. It floats around the edges of a choice without ever landing anywhere specific. Devil's advocacy demands precision. You have to name the actual weakness, not just feel a vague unease about it.
When you do this well, one of two things happens. Either the case against caring turns out weaker than you expected, and you move forward with a clarity that's been tested rather than assumed. Or the case turns out stronger than you expected, and you've just saved yourself from spending your limited attention on something that was never going to earn it. Both outcomes are worth having. Neither is a loss.
Playing Devil's Advocate With Others
In conversation, this practice carries its own particular skill, because you're now navigating another person's emotional relationship to the idea, not just your own.
The most important thing you can do is name the role before you step into it. "I want to play devil's advocate here, not because I disagree, but because I think this deserves the strongest test before we commit to it." That single sentence changes the entire emotional temperature of what follows. Without it, your counterpoints can land as personal doubt in the other person's judgment. With it, they land as an act of respect for the plan itself.
There's a difference, too, between playing devil's advocate and simply being negative, and the difference shows up in specificity. Vague negativity sounds like, "I don't know, it just seems risky." Devil's advocacy sounds like, "Here's the specific scenario where this falls apart, and here's why that scenario is more likely than we're currently accounting for." One creates defensiveness because there's nothing to engage with except a feeling. The other creates genuine thinking because there's a position on the table worth responding to.
If you're on the receiving end of someone playing devil's advocate with you, the work is different but just as important. Resist the urge to defend your idea immediately. Let the counterpoint exist for a moment before you respond to it. Ask yourself honestly whether it's pointing at something real. You don't have to agree with the conclusion to take the case seriously. Sometimes the most useful response isn't a rebuttal. It's an honest "that's fair, let me sit with that."
Where This Practice Opens Possibilities
People tend to associate devil's advocacy with business choices, and it's certainly valuable there. But I find the practice most generative in places people don't expect it, and it rarely just protects you from a mistake. More often it shows you something you wouldn't have noticed otherwise.
In creative work, picture a writer who has just finished a draft they feel genuinely good about, good enough that they're tempted to send it out immediately while the momentum is still warm. Playing devil's advocate against the work itself, asking what a sharp, honest editor would flag first, often surfaces something useful precisely because the writer is still close enough to the material to fix it. Sometimes that exercise reveals the piece is stronger than the writer's nerves were telling them. Sometimes it reveals a structural problem hiding under the energy of having just finished. Either way, the version of the project that survives that internal scrutiny is sturdier than the one that went out untested.
In relationships, picture the assumption that shows up before a hard conversation even starts, the conviction that you already know how it's going to go, that the other person is certainly going to react defensively or dismiss what you're trying to say. Building the strongest case for a different interpretation, that they might actually be relieved you brought it up, that their defensiveness in the past might have been about something else entirely, often reveals that the story you walked in with was only one of several plausible ones. You don't have to believe the alternative fully. You only have to test whether your certainty was earned or just familiar.
In personal growth, this same exercise can question the goals themselves, not just the path toward reaching them. Picture someone who has spent two years working toward a promotion, certain the title is what they want, who finally sits down and argues against wanting it at all. Sometimes that argument falls apart and the goal comes back sharper and more deserved. Sometimes it reveals that the actual desire underneath was never the title, it was the sense of being taken seriously, which might be available through an entirely different path. You might be so focused on achieving something that you've never asked whether the achievement still serves who you're becoming.
In parenting, picture the moment before you respond to your child's request with an automatic no, built from habit rather than from this particular situation, and pausing to build the case for why this time might actually be worth a yes. In friendships, picture catching yourself certain that a friend's silence means something has gone wrong between you, and building the case for the much more boring explanation, that they've simply been busy, before you let the certainty shape how you treat them the next time you talk. Anywhere something matters enough that you want to get it right, it's worth testing, including, maybe especially, the question of whether it deserves your caring before it ever becomes a plan.
How to Practice This Without Losing Trust
A few principles keep this tool useful rather than corrosive.
Time it. Devil's advocacy works best at the point of commitment, not after a choice has already been made and acted on. Once someone has committed and moved forward, relentless counterargument stops being useful testing and starts being undermining. Save it for before, not after.
Limit it. You don't need to argue every angle of every choice. Save this tool for the ones that genuinely carry weight, where being wrong would cost something real. Applying it to every small decision in your life turns a sharp tool into background noise.
End it cleanly. When the exercise is over, let it be over. Say so explicitly if you need to: "Okay, I've made my case. I trust you to decide." This matters because the role you've stepped into is temporary, and the people around you need to know when you've stepped back out of it.
Hold loosely to the position. The moment you start defending the devil's advocate case as if it were your real belief, you've stopped doing the exercise and started doing something else, something closer to genuine opposition. The whole value of the practice depends on its impermanence.
A few hesitations tend to come up once people start trying this, and they're worth addressing directly. Some worry that arguing against their own conviction means they don't really believe in it. The opposite tends to be true. You believe in something enough to want it tested before you give it your full weight, and conviction that's never faced a counterpoint is more fragile than conviction that has survived one.
Others worry that someone playing this role with them will turn defensive or hurt, or that playing it with someone else will damage the relationship. In practice, naming the role before you step into it dissolves most of that. People rarely react badly to an exercise they understand is being run in service of something they both care about getting right, which is exactly why that opening sentence matters as much as it does.
And if you're wondering how to know when you've done enough of this and it's time to simply decide, the answer is usually clear once you reach it. You've run out of new objections, not just new ways of phrasing the same one. When the case stops growing, the work of testing is finished, and what remains is the work of choosing.
The Deeper Reason This Matters
I think what keeps people from playing devil's advocate, with themselves or with each other, is a quiet fear that testing something too hard will break it. There's a kind of magical thinking in that fear, the sense that if we just don't look too closely, the plan will stay intact.
But the things worth keeping don't need protection from scrutiny. They need exposure to it. A commitment that can survive its own strongest counterpoint is sturdier for having survived it. One that can't was never as solid as it felt.
This is the real gift inside the phrase "play devil's advocate." It asks you to trust that clarity, even uncomfortable clarity, serves you better than comfortable uncertainty ever could. It asks you to care enough about getting something right that you're willing to argue against your own hope for a few minutes, knowing that whatever survives that argument is something you can actually stand on.
I still get emails like the one I described at the start of this, more of them than I can act on. And I still run the same exercise every time, building the case for why this one doesn't deserve my caring before I let myself believe it does. Most of the time the case falls apart, and I say yes with more conviction than I started with. Sometimes it holds, and I'm spared from a commitment that would have cost more than it gave back.
The next time you feel that pull, toward a plan, a request, an idea that's asking for a piece of your attention, consider pausing long enough to build the case against it. Not because you expect to be wrong. Because you want to know, with some real footing, that you're right. What you find in that pause might be exactly what you hoped for, now tested and steadier for having been tested. Or it might be something you needed to see before you went any further. Either way, you'll be standing on ground you actually checked, rather than ground you simply hoped would hold.
Keep reading
- The Simulator in Your Head: What Imagination Is Actually For
- The Zeus in You: Why the Old Gods Still Describe the Mind
- Why I Am Guilty of Having No Shame
- The Unflappable You: How to Stop Letting Others Ruffle Your Feathers
- Don't Assume the Worst; Talk to Me About It First
- Possible vs. Probable: Why the Difference Shapes a Life
- Why Old Advice Suddenly Makes Sense Years After You Heard It
- Accept Belonging & Belong Acceptance