TB: Six Thinking Hats (De Bono)
Core Thesis
The main difficulty of thinking is confusion: we try to do too many things at once — emotions, information, logic, hope, and creativity all crowd in simultaneously. The six hats method solves this by letting a thinker do one thing at a time, maximizing cognitive sensitivity in each direction sequentially.
Key Takeaways
The six hats
- White Hat: neutral, objective — concerned with facts and figures only
- Red Hat: emotional view — hunches, intuitions, impressions; no justification required or permitted
- Black Hat: caution and careful critique — points out weaknesses; perhaps the most important hat, but easily overused
- Yellow Hat: hope and positive thinking — deliberate search for value, not just optimism; requires "value sensitivity"
- Green Hat: creativity and new ideas — alternatives, provocations, lateral thinking; makes creativity a formal part of the process
- Blue Hat: thinking about thinking — organizes the process, typically worn by the facilitator
Key insights
- Pre-sensitization: the brain can be sensitized in only one direction at a time — looking for pros and cons simultaneously doesn't work in practice.
- Ego is perhaps the biggest obstacle to quick and effective thinking.
- If emotions aren't permitted as inputs, they lurk in the background and affect all thinking in a hidden way.
- The Red Hat's artificiality is its real value — emotions take time to well up; the hat lets you switch in and out in moments.
- The difference between good and bad thinkers lies in the ability to focus.
- Western thinking gives a conclusion first, then brings in facts to support it. Six Hats proposes "map-making" thinking: first make the map, then choose the route.
- In a normal business discussion, emotions come in disguised as logic — the red hat makes them visible.
On creativity (Green Hat)
- New ideas are delicate seedlings that need the green hat to protect them from the instant frost of the black hat.
- Creative thinking is usually in a weak position because it doesn't seem necessary — the green hat formally promotes it.
- A provocation can use reversal (inversion): "Po, the store pays the customers."
- A random word can trigger a provocation by providing a different starting point — different initial conditions can find a different (better) minimum.
Mental Models
- Discovery is Easy With the Right Context — each hat loads a different context for thinking
- Generator Filter — green hat generates; black hat filters
- Inversion — one simple provocation technique is reversal
- See the Good — yellow hat is "value sensitivity"; explicitly cross-linked in source note