Lateral thinking is a problem-solving approach that involves looking at a situation from unexpected angles rather than following a straight, logical path. Coined by physician and psychologist Edward de Bono in 1967, the term describes the deliberate effort to break out of established patterns of thought and generate ideas that wouldn’t emerge through conventional reasoning. Where traditional logic moves step by step toward a solution, lateral thinking jumps sideways, challenging assumptions and reframing the problem itself.
Lateral vs. Vertical Thinking
De Bono drew a clear distinction between two modes of reasoning. Vertical thinking is the kind most people learn in school: you analyze a problem, identify the most promising approach, and follow it logically to a conclusion. Each step builds on the last. It’s sequential, focused, and effective when the path forward is clear.
Lateral thinking works differently. Instead of digging deeper into one approach, you dig elsewhere entirely. You might reverse the problem, combine unrelated concepts, or deliberately introduce a random element to shake loose new possibilities. Vertical thinking selects the “right” direction early and stays the course. Lateral thinking deliberately resists selecting a direction, keeping options open as long as possible. De Bono emphasized that neither mode is superior on its own. Lateral thinking generates possibilities; vertical thinking evaluates and refines them. The most effective problem-solvers move between both.
Core Techniques
De Bono didn’t leave lateral thinking as a vague concept. He developed specific, repeatable techniques anyone can practice.
- Random entry. You introduce a completely unrelated word, image, or object into your thinking about a problem and force yourself to find connections. If you’re trying to improve a restaurant’s customer experience and you randomly select the word “library,” you might land on ideas about quiet zones, a browsing experience, or a recommendation system.
- Provocation. You make a deliberately absurd statement, prefaced by the word “po” (a term de Bono invented to signal that a statement isn’t meant to be judged as true or false). “Po, customers pay nothing” isn’t a business plan. It’s a lever that forces you to consider what a free model might look like, which could lead to subscription dining, sponsored meals, or pay-what-you-want pricing.
- Challenge. You question why something is done the way it’s done, not because it’s wrong, but because the question itself opens new territory. Why do restaurants have menus at all? Why do diners choose their own food? Challenging defaults often reveals that the original reason for a practice no longer applies.
- Reversal. You flip the problem or its elements. Instead of asking “How do we get customers to come to us?” you ask “How do we go to the customers?” Instead of reducing complaints, you ask what would happen if you actively sought out more complaints.
How Pattern Recognition Works Against You
The human brain is a pattern-making machine. Every experience you have gets sorted into existing mental frameworks, which is extremely efficient for daily life. You don’t need to relearn how a door handle works every morning. But this same efficiency creates deep ruts in thinking. Once you’ve categorized a problem, your brain automatically serves up the same types of solutions you’ve used before.
De Bono described the mind as a “self-organizing information system” where incoming data naturally arranges itself into patterns. These patterns become increasingly dominant over time, making it harder to see alternatives. Lateral thinking is essentially a set of tools for disrupting that automatic sorting process. You’re not trying to think harder. You’re trying to think differently, which your brain will resist because it’s wired to stay in the groove.
This is why lateral thinking requires deliberate effort and specific techniques rather than just “being creative.” Telling yourself to think outside the box doesn’t work because you can’t see the box from inside it. The techniques function as external disruptions that force your thinking off its default track.
Classic Examples
One of the most frequently cited examples of lateral thinking involves a truck stuck under a low bridge. Engineers and tow truck operators debate how to free the vehicle: disassemble part of the truck, raise the bridge, use heavy equipment to pull it out. A child watching suggests letting air out of the tires. The truck drops a few inches and drives free. The solution didn’t come from deeper expertise in engineering. It came from reframing what could change.
Another well-known case comes from the early days of commercial aviation. Airlines struggled with passenger complaints about long waits for luggage at baggage claim. The lateral solution wasn’t to speed up baggage handling. Instead, airports routed passengers on longer walks to the baggage area, so by the time they arrived, their bags were already on the carousel. The problem wasn’t slow bags. It was idle waiting time, and the fix addressed perception rather than logistics.
In business, lateral thinking drove the insight behind IKEA’s flat-pack furniture. The conventional assumption was that furniture should arrive assembled. Reversing that assumption, letting customers do the assembly, slashed shipping costs and warehouse space while creating a product line that could be carried home in a car.
Where Lateral Thinking Gets Used
Product design and marketing are natural homes for lateral thinking because both fields reward novel framing. Resistance to conventional category boundaries has driven some of the most successful product launches in recent decades, from smartphones (combining a phone, camera, and computer) to ride-sharing apps (reframing private cars as public transit).
In education, lateral thinking puzzles are used to build flexible reasoning skills in children and adults. These puzzles typically present a strange scenario and require yes-or-no questions to uncover the explanation. The classic “a man walks into a bar and asks for a glass of water; the bartender pulls out a gun; the man says thank you and leaves” puzzle can only be solved by abandoning the assumption that the gun was a threat. (The man had hiccups. The bartender scared them away.)
Engineering and science benefit as well, though the relationship is less obvious. Many scientific breakthroughs came from lateral reframing: Alexander Fleming noticing that mold killing bacteria in a petri dish was interesting rather than a ruined experiment, or the engineers at 3M who recognized that a failed adhesive (too weak to hold permanently) was actually a perfect repositionable glue, which became the Post-it Note.
How to Practice It
Lateral thinking is a skill, not a personality trait. De Bono was insistent on this point. People who seem naturally creative often just have more practice breaking out of default patterns. You can build the same ability with regular exercise.
Start with assumption listing. Take any problem you’re working on and write down every assumption you’re making about it. Then systematically question each one. If you’re trying to increase sales, your assumptions might include that you need more customers, that your price is right, that people know your product exists, or that sales happen through your current channels. Each assumption, once made visible, becomes something you can flip or discard.
Practice with constraints. Force yourself to generate ten solutions to a problem instead of stopping at the first good one. The first three or four will be conventional. By solution seven or eight, you’ll be reaching into unfamiliar territory, which is exactly where lateral thinking lives. The quality of individual ideas matters less than the habit of pushing past your first instinct.
Use the random entry technique in everyday decisions. Open a dictionary to a random page, pick a word, and spend two minutes connecting it to whatever challenge you’re facing. It feels forced at first. That discomfort is the point. You’re training your brain to build bridges between unrelated concepts, which is the fundamental mechanism behind creative problem-solving.
De Bono’s “Six Thinking Hats” method, developed as a companion framework, assigns different thinking modes (emotional, analytical, creative, cautious, optimistic, organizational) to different colored hats. Groups cycle through each hat deliberately, ensuring that lateral and generative thinking gets dedicated time rather than being crowded out by criticism and analysis, which tend to dominate meetings by default.