Edward de Bono and the invention of lateral thinking

Edward de Bono, a Maltese psychologist and physician, published The Use of Lateral Thinking in 1967. The work influenced decades of management, education, and design. His starting point was simple: traditional intelligence — the kind taught and measured — is mostly vertical thinking, which keeps digging deeper in the same groove. Excellent for optimization, it systematically fails when the problem requires changing the groove itself.

Lateral thinking is the opposite approach. It moves horizontally across the idea space, searching for unexpected entry points and questioning implicit assumptions that everyone accepts without noticing them. De Bono did not claim it was magical or innate; it is a technique, learnable in the same way as driving or chess.

What makes his approach remarkable is that he does not speak of “creative genius,” but of method. And games are, for him, one of the best training environments because they keep players inside a closed rule system where the obvious solution is often a deliberately built dead end.

Lateral thinking vs vertical thinking: two complementary tools

The distinction is not a value judgment. Both modes have value.

  • Vertical thinking: linear logic, step-by-step deduction, deepening one hypothesis. Ideal for well-defined problems with clear rules. Sudoku and arithmetic are good examples.
  • Lateral thinking: non-linear exploration, challenging premises, unexpected connections. Essential when the solution lies outside the problem frame as given. Contextual deduction puzzles such as “the man in the bar” illustrate this clearly.

In practice, strong problem solvers alternate both modes. Vertical thinking provides structure, while lateral thinking unlocks new routes. A game like Decoder illustrates this well: you deduce methodically (vertical), but when blocked you must test a counterintuitive hypothesis (lateral).

De Bono’s Six Thinking Hats: lateral thinking in collaborative mode

In 1985, de Bono formalized another widely used technique: the Six Thinking Hats. The idea is to approach a problem from six distinct perspectives, represented by colored hats:

  • White: raw facts and available data
  • Red: emotions, intuition, and feelings without rational justification
  • Black: critical judgment, risks, and objections
  • Yellow: optimism, benefits, and opportunities
  • Green: creativity, alternate ideas, and new lines of thought
  • Blue: meta-level process control

This system is now used in design-thinking workshops worldwide. Its base principle — use one mode at a time so logic and emotion do not neutralize each other — is directly applicable to complex puzzle solving.

Three classic lateral-thinking riddles

The man in the bar

A man walks into a bar and asks for water. The bartender suddenly points a gun at him. The man thanks the bartender and leaves. Why? The man had hiccups. The bartender startled him into stopping them. The wording suggests a hostile scene; the solution is elsewhere, in context the brain does not explore spontaneously.

The elevator riddle

A man lives on the 20th floor. Each morning he takes the elevator down to the lobby. In the evening, if he returns alone, he goes up only to the 15th floor and walks the last five floors. When he arrives with someone else, he goes directly to the 20th. Why? He is too short to press the 20th button unless someone presses it for him.

The surgeon

A father and son are in an accident. The father dies. The son is rushed to the operating room. The surgeon says: “I can’t operate on this child; this is my son.” How is this possible? The surgeon is the child’s mother. The riddle exposes an implicit bias in interpretation, not a logical paradox.

Four practical techniques for lateral thinking

De Bono identified several reproducible techniques. Here are four especially useful in games:

  • Provocation (Po): deliberately formulate an absurd statement to push thinking off its tracks. Example: “What if the black cells in a nonogram are actually the empty ones?”
  • Inversion: turn the problem upside down. Instead of asking how to connect A to B, ask how B could reach A. In Optimal Path, this is like tracing the route backward from the destination.
  • Random connections: introduce an unrelated external element and force associations. Useful for breaking stalled sessions in Hidden Links when no category is obvious.
  • Analogy: map the problem onto a totally different domain with shared structure. Logic Circuit can become clearer if viewed as a flow network rather than electronics.

6 Kognify games to practice lateral thinking

These games share one common trait: the first idea is rarely the correct one. They reward players who can reformulate their approach.

💡 Three practical lateral thinking exercises
  • Forced “what if” method: before solving a puzzle, list three absurd hypotheses about the solution. This often opens unexpected ideas.
  • Systematic inversion: for each new puzzle, start from the end. Trace the path from goal to start, mentally or on paper.
  • 60-second rule: if you have no lead after 60 seconds, deliberately drop your first approach and test a different entry point. Early dead-end is a strong signal you are still in vertical mode.

How games force you beyond obvious assumptions

A good lateral-thinking game is designed to challenge vertical thinking. In Light Grid, turning every dark light on in sequence is a natural approach, but it creates cascading interference and leads to a chaotic grid. The solution requires global configuration thinking, not pure sequential action.

In Hidden Links, creators intentionally include at least one “decoy” per group — a term that fits neatly in two different categories. Vertical thinking confirms the first association; lateral thinking suspends judgment and explores alternatives before confirming.

In Optimal Path, the visually shortest route is rarely the least-cost route once penalties and rough terrain are included. You must allow detours to return better later — a clean metaphor for lateral thinking itself.

Frequently asked questions about lateral thinking

What is lateral thinking exactly?
Lateral thinking is a concept formalized by Edward de Bono in 1967 to describe solving problems by stepping outside the usual logical path. Where vertical thinking deepens an obvious direction, lateral thinking searches unexpected angles, non-linear connections, and reformulations of the problem itself.
Can logic games develop lateral thinking?
Some logic game types do contribute, especially those with unexpected constraints or multiple solution routes. Decoder, Hidden Links, and Optimal Path are examples where the obvious first approach often fails, forcing a strategy rethink.
What are the best-known lateral-thinking riddles?
The man in the bar riddle (a man asks for water, the bartender points a gun, and the man leaves grateful) and the elevator riddle (a person takes the lift to the 15th floor and walks the last floors because they are too short to press the 20th button) are classic examples. They show that the solution is not in the stated problem but in its blind spots.
How is creativity different from lateral thinking?
Creativity is often spontaneous and difficult to teach directly. Lateral thinking is a set of reproducible techniques: provocation, inversion, random connections, and analogy. De Bono repeatedly noted that lateral thinking is a trainable skill, not an innate talent.
Are there free lateral thinking games on Kognify?
Yes. Hidden Links, Logical Deduction, and Decoder are fully free on Kognify with no download or signup required. These three games rely on non-conventional thinking: Hidden Links asks you to find unexpected links, Decoder forces hypothesis updates at each attempt, and Logical Deduction combines clues that may appear contradictory.