How Smart People Make Better Decisions Without Knowing Game Theory

"The difference between a wise person and a foolish one isn't that the wise person has better options it's that the wise person knows which options to throw away first."

The $100 Bill on the Sidewalk

Imagine you're walking down the street and see a $100 bill lying on the ground. Next to it, there's a $20 bill. You can only pick one.

Which do you choose?

If you said "$100," congratulations you just performed Iterated Elimination of Strictly Dominated Strategies.

You didn't need a PhD. You didn't need to know what "dominated" means. You simply looked at two choices, realized one was strictly worse in every possible way, and eliminated it.

Now, what if I told you that this simple act of "throwing away the obviously bad choice" is the same secret weapon used by chess grandmasters, successful politicians, savvy investors, and people in happy relationships?

Welcome to the most powerful decision-making tool you've never heard of explained so simply that anyone can use it today.

What Does "Iterated Elimination of Strictly Dominated Strategies" Actually Mean?

Let's break down this scary-sounding term into human language:

• Strategy = A choice you make
• Dominated = There's another choice that's ALWAYS better, no matter what happens
• Strictly Dominated = The other choice is better in EVERY possible scenario no exceptions
• Iterated Elimination = You keep doing this over and over until only smart choices remain

In plain English: Keep throwing away choices that are obviously stupid until only good choices are left.

That's it. That's the whole concept.

But don't let the simplicity fool you. This is the mathematical foundation of rational decision-making, and it applies to everything from choosing a life partner to negotiating your salary.

The Coffee Shop Dilemma: A Real Morning Scenario

Let's say you're at a coffee shop. You want the best coffee possible. The menu has four options:

Step 1: Compare A and B. Same price, same wait, but B tastes way better. A is strictly dominated by B. Throw away A.

Step 2: Compare C and D. Same price, same wait, but C is cold while D is... also cold and worse tasting. Actually, let's look at B vs C. B tastes better AND is hot. The only "advantage" of C is 0 wait time. But if you have 2 minutes (which you do), B is better.

Wait let's say you really need coffee NOW (0 minutes). Then C might not be dominated. But if you have 2 minutes to spare, C is strictly dominated by B.

Step 3: D is strictly dominated by... well, B if you have 2 minutes, or C if you need it now.

After eliminating the bad options, you're left with B (if you have time) or C (if you're in a rush).

You just did Iterated Elimination of Strictly Dominated Strategies before finishing your morning coffee.

Relationships: Why Your Friend Keeps Dating Losers

Your friend Sarah is dating three people:

• Alex: Kind, employed, makes her laugh, remembers her birthday
• Jordan: Kind, employed, boring, forgets important dates
• Casey: Unemployed, rude, constantly borrows money, "has potential"

Sarah says, "I'm confused about who to choose."

You don't need to be a relationship expert to apply our method:

Round 1: Compare Casey to Alex. Casey is worse in EVERY way less kind, no job, disrespectful, financial drain. Casey is strictly dominated by Alex. Eliminate Casey.

Round 2: Compare Jordan to Alex. Both are kind and employed, but Alex makes her laugh AND remembers birthdays. Jordan is strictly dominated by Alex in the things that matter to Sarah.

Result: Alex.

"But what if Casey is really handsome?" you ask.

If Sarah cares about looks, then Casey isn't strictly dominated he dominates in one category. But here's the key: if someone is worse in every category that matters to you, they are strictly dominated.

The tragedy is that many people keep "Casey" in the running because of sunk cost fallacy ("I've invested so much time") or hope ("They'll change"). Game theory says: Eliminate strictly dominated options immediately. They will never be the right choice.

Real-world application: When evaluating potential partners (or friends, or business associates), list the qualities that actually matter to you. If someone is worse than another option in ALL of those qualities, stop wasting your time. This isn't being picky it's being rational.

Job Hunting: The Salary Trap

You're offered two jobs:

• Job A: $80,000/year, 80-hour weeks, toxic boss, no growth
• Job B: $75,000/year, 40-hour weeks, great mentor, clear promotion path
• Job C: $50,000/year, 40-hour weeks, great mentor, clear promotion path

Round 1: Compare A vs B. B pays slightly less but gives you your life back, a mentor, and growth. Unless you're desperate for the extra $5k (and even then, calculate hourly wage: A = $19/hr, B = $36/hr), Job A is strictly dominated by B.

Round 2: Compare B vs C. Same hours, same mentor, same growth, but B pays $25,000 more. C is strictly dominated by B.

Result: B.

But here's where people mess up: They keep A in consideration because of ego ("I can't turn down $80k!") or status anxiety. They keep C because of fear ("What if I don't deserve $75k?").

Game theory doesn't care about your ego or fear. If one option is better in every way that matters, the other options are dead to you.

Real talk: When job hunting, define what matters: salary, work-life balance, growth, culture. If Job X beats Job Y in ALL categories, stop interviewing at Y. Stop wondering "what if." Stop letting recruiters string you along. Eliminate and move on.

Economy: Why Businesses Fail to Adapt

Kodak invented the digital camera in 1975. They had the technology before anyone else. But they dominated the film market, and film was extremely profitable.

Their strategic options looked like this:

In the 1980s and 90s, Strategy A was strictly dominated by B if Kodak's goal was long-term survival. But Kodak couldn't eliminate A because short-term profits were addictive. They kept the dominated strategy alive until it killed them.

Meanwhile, Fujifilm looked at the same game and eliminated film-dominated strategies faster. They diversified into cosmetics, medical imaging, and digital. They survived.

The lesson: In business and personal finance, "what's working now" can be strictly dominated by "what will work tomorrow." The hard part is having the courage to eliminate the comfortable choice before the market eliminates you.

Personal finance application: Keeping all your money in a savings account (0.5% interest) is strictly dominated by index funds (7-10% average return) for long-term growth. Yet millions of people keep doing the "safe" thing because they can't eliminate the dominated strategy of excessive cash hoarding.

Studies: The Procrastination Game

You're a student with three options for the weekend:

• Option X: Study hard all weekend (Ace exam, no fun)
• Option Y: Study a little, party a little (B+ exam, some fun)
• Option Z: Party all weekend (Fail exam, maximum fun... until you see grades)

If your goal is "pass the class AND have some fun":

Round 1: Compare X vs Y. Y gives you a B+ AND some fun. X gives you an A but zero fun. Y isn't strictly dominated by X it depends on how much you value fun vs grades.

Round 2: Compare Y vs Z. Y gives you a B+ and some fun. Z gives you an F and temporary fun followed by stress. Z is strictly dominated by Y (assuming you care about passing).

Result: Eliminate Z immediately. Now choose between X and Y based on your priorities.

Students who fail often do so because they keep Z in the running. They tell themselves "I'll start Sunday night" (which becomes Monday morning, which becomes "I'll do better next semester").

Game theory hack: When you catch yourself considering a strictly dominated option (procrastination when you have time to work), visualize yourself eliminating it. Literally say, "This choice is stupid in every way. Gone." It sounds silly, but it works because it activates the rational part of your brain.

The Parking Spot Problem: A Daily Life Example

You're driving to a crowded mall. You see three parking options:

• Spot A: Illegal, 10 feet from door, $200 ticket risk
• Spot B: Legal, 50 feet from door, free
• Spot C: Legal, 500 feet from door, free

Round 1: A vs B. B is legal, closer than C, and free. A is illegal with huge downside. A is strictly dominated by B.

Round 2: B vs C. B is closer. Same price. Same legality. C is strictly dominated by B.

Result: Park in B.

Yet people choose A because they're lazy, or C because they "don't want to fight for spots." Both are irrational. B exists. Take it.

Life is full of Spot B situations options that are clearly better but ignored because of habit, emotion, or not bothering to look. Iterated elimination forces you to actually look.

When This DOESN'T Work: The Limits of Rationality

Game theory is powerful, but it's not magic. Here are the catches:

1. You need to know what "better" means

If you don't know your own values, you can't eliminate options. A job with higher salary but worse culture isn't strictly dominated unless you define whether salary or culture matters more.

2. Information is never perfect

You might think an option is dominated when it's not. That "toxic boss" at Job A might actually be a demanding genius who'll transform your career. Be careful about eliminating too quickly based on incomplete info.

3. Emotions exist

Humans aren't robots. Sometimes we choose the "dominated" option because it feels right, because of loyalty, or because we're tired of being rational. That's okay. The goal isn't to be a machine it's to know when you're being irrational and choose consciously.

4. Other players are doing the same thing

In a game, everyone is eliminating their bad options. This changes the game. If everyone eliminates "bad" strategies, you might need to reconsider what "bad" means.

How to Use This Today: A 3-Step Cheat Sheet

You don't need to remember the fancy name. Just remember ELIMINATE:

Evaluate your options honestly

List them. All of them. Even the ones you don't want to admit you're considering.

Look for the "always worse" choice

Is there an option that loses in EVERY category that matters? Cross it out. Be ruthless.

Iterate

After eliminating one, look again. Is there another option that was only viable because the first bad option existed? Eliminate it too.

Make the choice

What's left? Usually 2-3 genuinely good options. Now use your gut, your values, or a coin flip.

Ignore sunk costs

The time/money/emotion you've invested in a dominated strategy doesn't matter. It's gone. Don't throw good resources after bad.

No regrets

Once you eliminate a strictly dominated option, never look back. It was never the right choice.

Adapt when information changes

New info might make a previously dominated option viable. Stay open, but don't keep dead options alive out of hope.

Trust the process

This isn't about being cold or robotic. It's about freeing up mental energy for the choices that actually matter.

Execute

Make the call. Commit. Move forward.

The Beautiful Truth

Here's what nobody tells you about game theory: It's not about winning against other people. It's about stopping yourself from losing against yourself.

Most bad decisions happen because we keep options alive that should have died long ago:

• The job we hate but won't quit
• The relationship that drains us but we won't leave
• The investment that's tanking but we won't sell
• The habit we know hurts us but we won't drop

Iterated Elimination of Strictly Dominated Strategies is just a fancy way of saying: Have the courage to kill your darlings. Have the discipline to stop doing things that are obviously stupid. Have the clarity to see that "not terrible" is still not "good enough."

You don't need a PhD. You don't need to know what a payoff matrix is. You just need the willingness to look at your choices and ask: "Is this option worse than another one in every way that matters?"

If the answer is yes, eliminate it.

Then ask again.

And again.

Until what's left is not just the best you can do, but the best you should do.

Your Homework (Yes, Really)

Pick one decision you've been agonizing over this week.

1. List all your options (at least 3)
2. Define what matters (at least 3 criteria)
3. Find one option that's worse in ALL criteria than another option
4. Eliminate it. Permanently.
5. Repeat until you have 2 options left
6. Choose one by Friday

That's it. That's the whole game theory Applied, Welcome to rationality. It's simpler than you thought, and more powerful than you imagined.

Further Reading:

• Thinking Strategically by Avinash Dixit and Barry Nalebuff
• The Art of Strategy by the same authors (even more accessible)
• Predictably Irrational by Dan Ariely (for when elimination isn't enough)