Think back to a decision you regret. The strange thing is that, when you made it, it probably didn’t feel like a bad decision at all. You had reasons for making it. You could explain what you were doing. Maybe other people even agreed with you.

Years later, the same decision can look almost embarrassingly obvious. Hindsight gives you something you didn’t have when the decision was made: the ending.

The interesting part is what you were telling yourself before you knew how the story would end.

Maybe you spent years in a career you no longer enjoyed. Leaving would mean giving up a familiar routine, a reliable income, the status you had earned, and the sense of who you were at work.

So your mind found ways to make staying feel reasonable. There was always another reason to wait. Maybe things would improve after the next bonus. Maybe the new manager would be different. You had already spent years getting here. Surely it made sense to stay a little longer.

None of those thoughts had to be false.

That was the problem.

Our minds can help us solve problems, but they can also become remarkably good at finding reasons to defend what we’ve already decided.

Thinkers like Bacon, Descartes, Munger, and Socrates approached this problem from very different directions. But they shared an uncomfortable discipline: they kept looking for ways to catch themselves being wrong.

The methods are old. The decisions they can improve are very modern.

The Mind Can Build a Perfect Case for the Wrong Decision

Consider someone who keeps lending money to a relative or a friend who repeatedly promises to repay it.

Each time, the story sounds different.

There was an emergency this time. The repayment was supposed to be certain. Saying no felt cruel. The person knows the pattern. They’ve seen it before. Yet every new request comes with a reason that makes saying yes feel reasonable again.

They aren’t necessarily lying to themselves. In fact, they may genuinely believe that this time will be different.

Francis Bacon recognised this problem centuries ago. In Novum Organum, he described recurring distortions in human judgement as the “Idols”, arguing that false ideas can become deeply rooted in the human understanding.

Your mind never approaches a decision empty-handed. It brings your experiences, fears, preferences, identity, and previous conclusions with it.

Someone who has spent their life equating generosity with being a good person will interpret saying no differently from someone who sees boundaries as part of a healthy relationship.

So before asking, “What’s the answer?” there’s another question to ask first: What am I assuming?”

Question the Assumptions That Make the Answer Seem Obvious

Someone says, “I can’t afford to move closer to work.” That sounds like a financial fact. But they may be comparing the new rent with their current rent and stopping there. The daily transport costs and hours lost in traffic barely enter the calculation.

The same thing happens with beliefs about ourselves.

“I’ve already spent ten years becoming good at this. Starting over would make those years feel wasted.”

It sounds like a reason to stay. But it may have more to do with defending the decision that got you there.

What sounded like reality can start looking more like a conclusion.

René Descartes took this problem seriously. Looking back at his own beliefs, he realised how much he had accepted without sufficiently examining. In Meditations on First Philosophy, he reflected that he had “accepted, even from my youth, many false opinions for true.”

His contribution wasn’t that we should doubt everything forever. It was the discipline of stepping back far enough to separate what we actually know from what we have simply grown accustomed to believing.

But there’s another problem. You can question the assumptions inside a problem and still never question the way you framed the problem itself.

Sometimes the answer isn’t hiding inside the frame. The frame is what needs to change.

When the Problem Keeps Resisting You, Change Where You Look

Imagine trying to become more productive because your workload keeps growing. You keep rearranging your calendar, trying to squeeze unfinished work into the gaps between meetings. Eventually you try another productivity app and decide the real problem is that you’re starting the day too late. Tomorrow, you’ll get ahead.

Every attempt is aimed at the same question: How can I fit everything into the day?

A different thinker might ask, ‘Why does everything need to fit into the day in the first place?’

Maybe you’ve put five important priorities into a day that can realistically handle three. The problem isn’t that you haven’t found the right system for managing five priorities. You haven’t questioned why all five became priorities.

When the usual approach keeps producing the same result, it can help to step outside the frame. This is the value of orthogonal thinking: borrowing a perspective from somewhere else to see a familiar problem differently.

A restaurant kitchen doesn’t handle a busy service by asking every cook to do everything. It divides the work into stations, sequences tasks, and identifies bottlenecks. That same principle can change how you think about an overloaded workday: perhaps the answer isn’t becoming better at handling more work but deciding what doesn’t deserve a place on the plate.

When you’re stuck, don’t only ask, “What answer am I missing?” Ask, “What would someone from a completely different field notice here?”

A different perspective can reveal an assumption that has been hiding in plain sight.

Look Beyond the First Consequence

A decision can look sensible when you only examine what happens immediately after you make it.

You avoid a difficult conversation and feel relieved because you don’t have to deal with it tonight. You take on another freelance client because the extra income seems too good to refuse.

Even buying something can work this way. After spending weeks researching an expensive option, choosing the cheaper one can feel like admitting that all that research was wasted.

The immediate benefit is easy to see. The consequences that come later are harder to notice.

This is where Charlie Munger’s advice to “invert, always invert” becomes useful. Instead of asking only how a decision could work out, ask how it could go wrong.

If you take an extra client, the additional money may genuinely help. But the work could consume the evenings you need to recover and leave you with no time to pursue the opportunity you actually want. Six months later, you might be earning more while having less time and energy to do anything with it.

The client may still be worth taking. The point is to see what the decision sets in motion before you make it.

Some decisions give you more options later. Others gradually take options away.

Learning a portable skill can create new opportunities. Taking on so many commitments that you have no time to use that skill can close those opportunities before they arrive. Saving money can give you the freedom to leave a bad situation.

So before you commit, ask: “And then what?”

You don’t need to predict the future perfectly. You need to look beyond the first consequence.

And sometimes the most important consequence isn’t about money, time, or opportunity. It’s about you.

The Hardest Beliefs to Challenge Are the Ones That Protect Your Identity

What happens when changing your mind means changing the story you have about yourself?

You’ve spent months telling your friends that a new job is exactly what you needed. You explained the higher salary, talked about the better benefits, and told them how much you would learn.

Six months later, you’re miserable.

Now the problem isn’t only whether the job is right for you. You’ve already built a story around why taking it was the right decision. Leaving means admitting that the story wasn’t entirely true.

This is close to the approach Socrates practised. His method wasn’t simply to provide people with better answers. He repeatedly questioned the certainty underneath the answers they already had.

In Plato’s Apology, Socrates describes examining himself and others as part of “the greatest good to man” and argues that “the unexamined life is not worth living.”

So ask yourself: What evidence would force me to reconsider this? What part of my conclusion am I defending because it’s true, and what part am I defending because I’ve already told other people it’s true?

That distinction matters because changing your mind can feel more threatening when other people have heard you explain the decision over and over.

You told your friends this was the opportunity you had been waiting for. You told your family the move would be good for you. You spent months explaining why the decision made sense.

Now admitting that you were wrong can feel less like changing a decision and more like changing the story about yourself.

“This is who I am” is harder to question than “I believe this.”

That’s why identity can make us surprisingly resistant to evidence. If a friend stops inviting you out, you can quickly settle on a story: they’ve become distant, arrogant, or uninterested in the friendship.

They could be overwhelmed. Something you said might have landed badly. You might have stopped reaching out first.

The same thing happens with bigger decisions. You can spend years pursuing something that no longer makes sense because admitting it would mean admitting that you misunderstood what you wanted, stayed somewhere too long, or defended a choice because your pride was attached to it.

Sometimes the thing we’re protecting isn’t the decision. It’s the person we think the decision proves we are.

What Six Months of Better Thinking Can Change

At first, nothing about this will feel profound.

Someone sends you a message that irritates you. Your first impulse is to answer immediately because you believe they were disrespectful. Instead, you pause.

What do you actually know? What are you assuming about their intention? What would someone looking at the situation differently notice? What evidence would change your interpretation?

You may still decide to respond firmly. The difference is that you’ve given yourself a chance to find out whether your first interpretation was right.

Over time, you start noticing when an explanation has become a defence. You catch yourself treating a constraint as a fact when it’s really a choice. You become more willing to reconsider the way you’ve framed a problem. You get better at separating what happened from the story you’ve built around it.

That is where these methods become useful. They don’t make you incapable of being wrong. They make it easier to notice when you are.

You’ll still make bad decisions. You’ll still misunderstand people. You’ll still believe things that later turn out to be wrong. But you may catch yourself sooner.

A decision can be abandoned without treating the years already invested in it as a reason to continue. Criticism can be heard without immediately turning it into an attack on your identity. You become less interested in proving that you were right and more interested in finding out whether you are.

You don’t need to memorise dozens of intellectual techniques. Carry these five questions with you:

• What am I assuming?
• What do I actually know?
• What am I missing because I’m looking at this from the same angle?
• And then what?
• What would change my mind?

Use them when a decision matters: a job offer, a major purchase, a relationship, a business idea, a commitment, or a belief about yourself.

The more often you use them, the sooner they can interrupt the reasoning that normally happens automatically.

The goal of better thinking isn’t certainty. It’s correctability.

The costliest mistakes aren’t always the ones we make. Sometimes they’re the ones we spend years explaining to ourselves after we should have changed our minds.