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Six Thinking Hats Reference
Purpose: Edward de Bono's parallel-thinking protocol that separates a single deliberation into six discrete cognitive modes (one "hat" at a time, the whole group wears the same hat together). Replaces argumentative cross-talk with sequenced single-mode passes, surfacing facts, feelings, risks, benefits, alternatives, and process control without the role-fixation that plagues classic debate.
Scope Boundary
- magi
sixhat: parallel-thinking protocol applied to a proposal already on the table. Group cycles through six hats in a planned sequence. Output is a hat-by-hat synthesis feeding the standard Logos/Pathos/Sophia VOTE.
- magi
decide / tradeoff / arbitrate / strategic (default lanes): independent three-perspective evaluation. Use when a structured verdict is the goal, not divergent surfacing.
- magi
devil (elsewhere): formal opposition. Black Hat is one mode of six; Devil's Advocate is an entire structured red-team protocol with rotated dissenter, not a single-mode pass.
- magi
delphi (elsewhere): anonymous multi-round expert convergence. Six Hats is single-room, named, parallel — not anonymous, not iterative across days.
- flux (elsewhere): reframes the problem (axes, lenses, paradigm shifts). Six Hats keeps the problem fixed and rotates evaluation modes.
- flux (elsewhere): iterative dialogue idea-deepening. Six Hats is single-pass per hat with strict mode discipline.
- omen (elsewhere): enumerates failure modes via FMEA/RPN. Black Hat overlaps but is qualitative, time-boxed, and embedded in a six-mode rotation.
Workflow
SETUP → facilitator picks Blue Hat opener; selects sequence (eval vs solve)
→ state proposal in one sentence; agree time box per hat (3-5 min typical)
BLUE-1 → define purpose, scope, success criteria for this session
→ declare hat order; participants commit to mode discipline
ROTATE → whole group wears same hat at the same time
→ no cross-hat interjections; out-of-mode comments parked by Blue
CAPTURE → scribe logs each hat's outputs as separate columns (W/R/B/Y/G)
→ no confidence scores yet; surface-mode only
BLUE-2 → summarize, choose action, route to Magi VOTE or extend a hat
→ if Yellow+Green dominate Black: green-light; else loop
The Six Hats
| Hat |
Color |
Mode |
Prompt |
Anti-mode (caution) |
| White |
White |
Facts and information |
What do we know? What's missing? |
Speculation, interpretation |
| Red |
Red |
Emotion, intuition, gut |
How does this feel? (no justification) |
Rationalizing, defending |
| Black |
Black |
Caution, risk, critical judgment |
What could go wrong? What's the weakness? |
Personal attack, blanket negativity |
| Yellow |
Yellow |
Optimism, value, benefits |
What's the upside? Why will it work? |
Wishful thinking without basis |
| Green |
Green |
Creativity, alternatives, new ideas |
What else? What if? |
Editing or judging ideas |
| Blue |
Blue |
Process, meta, control |
What hat next? Are we on track? |
Acting in another hat's mode |
Sequencing Protocols
| Sequence |
Use case |
Order |
Notes |
| Idea-evaluation |
Assessing a single concrete proposal |
Blue → White → Yellow → Black → Red → Blue |
Facts first, then upside, then risk, gut last |
| Problem-solving |
Open-ended challenge, no proposal yet |
Blue → White → Green → Yellow → Black → Green → Blue |
Generate before judging; second Green addresses Black's risks |
| Quick decision |
Time-boxed Go/No-Go (under 15 min) |
Blue → Black → Yellow → Red → Blue |
Risk and value, then gut check |
| Conflict resolution |
Group is stuck or polarized |
Blue → Red → White → Yellow → Black → Green → Blue |
Surface emotion first, then ground in facts |
| Strategic planning |
Long-horizon decisions |
Blue → Yellow → Black → White → Green → Blue |
Vision, risks, evidence, alternatives |
Time-Boxing Defaults
| Hat |
Default |
Min |
Max |
Rationale |
| Blue |
2 min |
1 |
5 |
Process should be tight |
| White |
4 min |
3 |
8 |
Fact recall takes time |
| Red |
1 min |
0.5 |
2 |
Gut is fast; long Red invites rationalization |
| Black |
5 min |
3 |
10 |
Risk surfacing benefits from depth |
| Yellow |
4 min |
3 |
8 |
Symmetric with Black to prevent imbalance |
| Green |
5 min |
3 |
10 |
Creativity needs room |
Total typical session: 20-35 min for evaluation, 30-50 min for problem-solving.
Hat-Switching Rules
- Whole group, same hat: never split (e.g., "you take Black, I take Yellow") — that's role-fixation, not parallel thinking.
- No cross-hat in mode: a Black comment during Yellow is parked by Blue and surfaced when Black returns.
- Blue owns transitions: only the facilitator (Blue) calls the next hat; participants don't self-switch.
- Symmetry rule: every Black session must be paired with a Yellow session of equal time, to prevent bias toward criticism or optimism.
- Red is brief and unjustified: Red feelings are stated, not defended. "I feel uneasy" stands; "I feel uneasy because X" is Black in disguise.
- Green is judgment-free: ideas float without evaluation; evaluation happens only when Black/Yellow return.
Facilitator (Blue Hat) Script
- Opening: "We're deciding [proposal] in [time]. We'll use [sequence]. Hat order: [list]. I'll call hats and time-keep."
- Mid-session: "We're now wearing [Hat]. The question is [hat's prompt]. Out-of-mode contributions get parked."
- Park: "Good point — I'll park that as a [Black/Yellow/Green] item for when we get there."
- Closing Blue: "Summary: [White facts] + [Yellow benefits] + [Black risks] + [Red gut] + [Green alternatives]. Recommended action: [verdict]."
Tie-In With Magi's Three Perspectives
- White outputs feed Logos (facts, evidence base).
- Red and Pathos overlap (emotion, human impact) — Red is collective gut; Pathos is structured stakeholder modeling.
- Black informs Logos risk register and Pathos team-impact concerns.
- Yellow and Green inform Sophia (business value, alternatives).
- Blue maps to Magi's facilitator role at SYNTHESIZE.
- After Six Hats: pass hat outputs as evidence into the standard FRAME → DELIBERATE → VOTE workflow. Six Hats produces structured surfacings; Magi produces the verdict.
Anti-Patterns
- Splitting hats across people ("you're Black, I'm Yellow") — that's classic debate with color labels, not parallel thinking. Group must wear the same hat together.
- Skipping the second Blue — without a closing Blue, outputs scatter and no decision is named.
- Over-running Black without matching Yellow — produces a critique session masquerading as deliberation; pairs of equal time.
- Letting Red turn into argued opinion — "I feel X because Y, Z, and W" is Black in red costume. Cap Red at 60-90 seconds, no justification required.
- Using Six Hats on a problem with no proposal — switch to problem-solving sequence (Green-heavy) or run Flux first to reframe.
- Treating Six Hats as a verdict mechanism — it's a surfacing tool. Always feed outputs into Magi's VOTE phase for the actual decision.
- Running Six Hats with one person — it's designed for parallel group thinking; solo use collapses into ordinary checklist review and loses the parallelism benefit.
- Mixing hats in a single round (Black-then-Yellow ping-pong) — destroys mode discipline; use the planned sequence and hold the line.
Handoff
- To Magi VOTE: hat-column outputs become structured evidence for Logos (White, Black-risks), Pathos (Red, Black-team-impact), Sophia (Yellow, Green).
- To Flux: if Green Hat outputs reveal the original frame is wrong, halt and route to Flux for reframing before resuming.
- To Omen: Black Hat outputs that warrant quantitative scoring (RPN/AP) escalate to Omen for FMEA-grade enumeration.
- To Flux: if Green Hat surfaces an idea worth deepening rather than deciding, route to Flux for iterative expansion before returning to Magi.
- To human: if Blue closing reveals no consensus and Red gut-checks diverge sharply from Black/Yellow analysis, escalate as a values disagreement, not a fact dispute.