Mental model
Lateral Thinking
A method of problem-solving that involves approaching issues from creative and indirect angles, rather than with traditional step-by-step logic.
Discover
A man lives on the 10th floor. Every morning he takes the elevator to the ground floor. When he returns, if it's raining, he goes to the 10th floor. If it's sunny, he goes to the 7th and walks the rest. Why?
What's the hidden reason?
Solving puzzles like this uses a skill called lateral thinking.
Understand
Understand
The elevator riddle is tricky because we assume facts that aren't there, like the man's height. Lateral thinking is the skill of challenging those assumptions to find creative solutions that aren't immediately obvious.
It's about stepping sideways—laterally—from the predictable path of logic to explore new possibilities. For instance, instead of building a better mousetrap (a direct solution), a lateral thinker might ask how to make the house less appealing to mice in the first place.
Ask this: What am I assuming is true here that might not be?
Full explanation
Full explanation
Lateral thinking, a term coined by Edward de Bono, is the direct opposite of traditional, or 'vertical,' thinking. Vertical thinking is logical, sequential, and analytical—like digging a single hole deeper and deeper. Lateral thinking is about deliberately trying to dig a hole in a completely different place to see what you find.
It works by using techniques to provoke new lines of thought. These can include questioning basic assumptions, reversing a problem statement, or using random prompts (like opening a dictionary and using the first word you see) to break out of rigid thinking patterns.
For example, a marketing team struggling to sell a new, healthy snack might use vertical thinking to tweak the recipe or lower the price. A lateral approach would be to reframe the product entirely—not as a 'snack,' but as a convenient 'meal supplement' for busy athletes, opening a completely new market.
In daily life, if you keep losing your keys, the vertical solution is to try harder to remember where you put them. The lateral solution is to make them impossible to lose in the first place by installing a key hook by the door, using a digital lock, or attaching a Bluetooth tracker.
Lateral thinking doesn't replace vertical thinking; it complements it. You use lateral thinking to generate a wide range of creative possibilities, and then use vertical thinking to evaluate their logic and practicality.
Research
Research
Edward de Bono formally developed lateral thinking as a set of techniques for creativity, contrasting it with analytical 'vertical thinking.' While its effects can be difficult to quantify, research explores its application in education and management, and meta-analyses suggest creativity training is broadly effective.
- De Bono introduced lateral thinking as a skill for generating new ideas by deliberately escaping established patterns, unlike vertical thinking which operates strictly within them. [1] (1970)
- Early reviews noted that while influential, empirical evidence for specific techniques was often anecdotal, highlighting the challenge of objectively measuring creative output. [2] (1989)
- De Bono's work, particularly tools like 'Six Thinking Hats,' provided managers with a practical language for creativity, helping shift the perception of innovation from an innate gift to a learnable process. [3] (2009)
- Quantitative reviews and meta-analyses have since found that creativity training programs, which often incorporate lateral thinking principles, are generally effective at enhancing creative performance across various domains. [4, 5, 6] [4] (2004)
Limitations
Limitations
A primary critique is the lack of rigorous, empirical evidence proving its superiority over other creativity methods. Some critics argue it's a rebranding of older creativity concepts and that its techniques can feel forced or produce impractical ideas if not grounded by logical evaluation. It may also be less effective for problems that require deep, specialized expertise and incremental improvement rather than a complete reframing.
Try it
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Sources
Sources
- [1] Lateral Thinking: Creativity Step by StepEdward de Bono - 1970
- [2] The nature of creativity: Contemporary psychological perspectivesP. E. Vernon (in book edited by R. J. Sternberg) - 1989
- [3] The Routledge Companion to CreativityTudor Rickards, Mark A. Runco, & Susan Moger (eds.) - 2009
- [4] The effectiveness of creativity training: A quantitative reviewScott, G., Leritz, L. E., & Mumford, M. D. - 2004
- [5] A synthetic analysis of the effectiveness of single components and packages in creativity training programsMa, H. H. - 2006
- [6] Approaches to measuring creativity: a systematic literature reviewSaid-Metwaly, S., van den Noortgate, W., & Kyndt, E. - 2017
Try it
Check your understanding
The elevator riddle is best solved by questioning which hidden assumption?
Show the guide's explanation
Answer: The man's physical abilities are normal.
The riddle's solution requires challenging the assumption about the man's height. He is too short to reach the higher floor buttons but can use his umbrella to press them on rainy days.
A city wants to reduce traffic congestion. A 'vertical thinking' approach is to build more roads. Which of the following is the best example of a 'lateral thinking' approach?
Show the guide's explanation
Answer: Introducing a fee to discourage driving at peak times.
Building more roads (vertical thinking) addresses the symptom directly. A congestion fee reframes the problem from 'how to fit more cars' to 'how to have fewer cars on the road,' which is a lateral shift in thinking.
Which of these questions is most characteristic of lateral thinking?
Show the guide's explanation
Answer: What if this 'problem' was actually an opportunity?
This question reframes the entire situation, challenging the basic assumption that a 'problem' must be negative. It opens up a completely new direction for thought, which is the core of lateral thinking.
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