Assumption Reversal

Quick facts

Mechanism: Generates non-obvious ideas by surfacing the foundational assumptions a problem or solution rests on, negating each, and reframing from the reversed assumptions, then shortlisting, producing an assumptions-and-reversals sheet.

Produces: assumptions-and-reversals-sheet

Evidence: P · Domain: Divergent Ideation

Use when an option space feels stuck inside default constraints, or when you need to expose premises that are taken for granted.

Solutions stay trapped inside the assumptions a problem is stated with. Assumption reversal makes those premises explicit, negates or reverses each, and generates ideas from the reversed world. It is not generic inversion (“how would we cause failure?”); it targets the foundational premises the option space rests on and uses their reversal as an idea generator. The output is an assumptions-and-reversals sheet ending in a shortlist. Reversed assumptions are candidates to explore, not recommendations.

When to Use

• An option space feels stuck inside default constraints.
• The obvious solutions all seem to share a hidden premise.
• Early divergent exploration, when breadth matters more than convergence.

When NOT to Use

• When the binding constraints are genuinely fixed (regulatory, physical) and cannot be reversed in reality.
• When you need to converge and choose (use a decision skill).
• As a source of recommendations (it produces candidates, not decisions).
• If it would only reverse trivial, cosmetic assumptions.

Instructions

When asked to run assumption reversal, follow these steps:

1. State the problem or solution in one line.
2. Surface the foundational assumptions. List the load-bearing premises it rests on (business model, user, channel, sequence, who pays, what is required). Push for the ones so basic they are usually unspoken.
3. Reverse each. Negate or invert the assumption (“what if the opposite were true?”).
4. Generate from the reversal. For each reversed assumption, write the ideas it provokes. Keep the ideas genuinely tied to the reversal.
5. Shortlist. Pick the most promising non-obvious ideas to carry forward, and note what would have to be true for each to be viable.
6. Emit the sheet per references/TEMPLATE.md.

Output Format

Use the template in references/TEMPLATE.md. The deliverable is the assumptions, reversals, ideas, and shortlist, not prose.

Quality Checklist

Before finalizing, verify:

• The assumptions surfaced are load-bearing, not trivial.
• Each assumption is genuinely reversed, not just reworded.
• The ideas are tied to the reversal, not generic.
• A shortlist of non-obvious ideas is selected, flagged as candidates not decisions.
• The output is the sheet artifact, not prose.

Evidence

Tier P. Assumption reversal is a recognized divergent-ideation technique from lateral-thinking practice, distinct from inversion. Deliberately challenging default premises broadens the option set, but there is no strong evidence it outperforms other generators, and reversing an assumption does not make the reversal viable. Evidence is transferred from human creativity practice, not AI-validated. Full grading: evidence/dossier.md.

Examples

See references/EXAMPLE.md for a completed sheet.

Deep dive: worked example

A full worked run (the shared Northwind scenario)

Assumptions-and-Reversals Sheet - Worked Example

A completed run of think-assumption-reversal, on the shared Northwind scenario. This is the quality bar a generated sheet should meet.

Northwind is a B2B SaaS stuck on growth options that all assume the same things. Here the skill reverses the premises under “how we acquire customers.”

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Subject

• How Northwind acquires new customers (the growth motion).

Assumptions and reversals

#	Foundational assumption	Reversed	Ideas the reversal provokes
1	Users sign up, then we convert them	They are converted before they sign up	Sell the outcome via a done-for-you pilot; signup is the last step, not the first
2	Each company buys its own seats	Someone else pays for their access	Partner/marketplace bundles; an integration partner includes Northwind for its customers
3	Growth means more new logos	Growth comes from existing accounts	Expansion-led growth: land tiny, expand within the account; no new free-tier funnel needed
4	Acquisition is self-serve and async	Acquisition is high-touch and synchronous	Concierge onboarding for a narrow ICP segment that converts at a premium
5	We must lower the barrier to entry (free)	We raise the barrier deliberately	Invite-only / qualified-access positioning that increases perceived value and ICP fit

Shortlist (carry forward)

1. Expansion-led growth (reverse of #3) - would have to be true: existing accounts have meaningful unpenetrated seats/use cases. Cheap to test from current account data, and sidesteps the entire free-tier debate.
2. Partner-paid distribution (reverse of #2) - would have to be true: a partner with the right install base exists and benefits from bundling. Higher effort, large upside.
3. Qualified-access positioning (reverse of #5) - would have to be true: scarcity raises ICP conversion more than openness raises volume. Directly contradicts the free-tier instinct, worth a small test.

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Note: the value is that reversing assumptions #3 and #5 produced options that make the free-tier question moot (grow from existing accounts; or go more exclusive, not less). These are candidates - feed the shortlist into a decision review, not straight into a build.

Grounding: the full evidence dossier

What the research does and does not show, with graded sources

Evidence Dossier: Assumption Reversal

Single source of truth for the assumption-reversal skill. The SKILL.md, sidecar, and evals derive from this.

Skill	thinking-framework-skills.assumption-reversal (installable name think-assumption-reversal)
Family	divergent-ideation
Evidence tier	P (practitioner creativity technique)
Confidence	Moderate that perturbing assumptions yields novel options; the gain is breadth, not correctness
Status	draft (authored 2026-05-31 from the discovery corpus)

1. The mechanism (what actually does the work)

Solutions stay trapped inside the assumptions a problem is stated with (“software is sold by subscription”, “the user needs a screen”, “onboarding requires a signup”). Assumption reversal makes those premises explicit, negates or reverses each, and generates ideas from the reversed world. It differs from generic inversion (which asks “how would we cause failure?”): this targets the foundational premises the option space rests on, and uses their reversal as a generator. For a model specifically, reversing a load-bearing assumption pushes generation into the less-obvious regions it would otherwise skip.

2. Lineage

• A staple of lateral-thinking and creative-problem-solving practice (assumption-busting / assumption reversal). The discovery research flags it as a distinct white-space technique, separate from inversion.

No trademark. Named descriptively.

3. What the evidence shows, and what it does NOT show

Supported (modestly): structured perturbation of assumptions is a recognized divergent-ideation technique; deliberately challenging defaults broadens the option set relative to working inside them.

NOT shown: no strong controlled evidence that assumption reversal outperforms other generators, and reversing an assumption proves nothing about whether the reversal is viable. It generates candidates; it does not validate them. Grade P.

4. Transferred-evidence flag

Evidence is from human creativity practice, not AI-augmented use. Transferred, not AI-validated. The AI value: a model anchors hard on the assumptions in the prompt; forcing it to name and reverse the load-bearing ones is a direct counter to that anchoring, and the sheet is a structured artifact.

5. When it works / when it fails

Works best when: an option space feels stuck inside default constraints; the obvious solutions all share a hidden premise; early divergent exploration.

Fails or misleads when (poor-fit / anti-patterns):

• Reversing trivial or cosmetic assumptions rather than the load-bearing ones.
• Generating ideas with no real link to the reversal (decoration).
• Treating a reversed assumption, or an idea from it, as a recommendation (it is a candidate, not a decision).
• When the binding constraints are genuinely fixed (regulatory, physical) and cannot be reversed in reality.
• When you need to converge and choose (use a decision skill).

6. Output artifact

An assumptions-and-reversals sheet: the foundational assumptions listed, each with its reversal, the ideas the reversal provokes, and then a shortlist of the most promising non-obvious ideas to carry forward.

7. Sources

1. Lateral-thinking / creative-problem-solving practice on assumption reversal and assumption-busting (distinct from inversion).

Verification status: the technique is well-attested in creativity practice; treat effectiveness as practitioner-level. Do not present reversed assumptions as validated options.