---
id: ins_miller-caveman-test
operator: Donald Miller
operator_role: Founder StoryBrand and Business Made Simple; author Building a StoryBrand
source_url: https://storybrand.com/
source_type: book
source_title: "Building a StoryBrand — The Caveman Test"
source_date: 2017-10-10
captured_date: 2026-05-05
domain: [pmm, design, marketing]
lifecycle: [homepage-design, messaging-narrative, copy-and-content]
maturity: applied
artifact_class: framework
score: { originality: 4, specificity: 5, evidence: 3, transferability: 5, source: 5 }
tier: A
related: [ins_miller-survival-value-messaging, ins_storybrand-customer-is-hero, ins_homepage-five-second-trinity]
raw_ref: raw/expert-content/experts/donald-miller.md
---

# Could a caveman understand your homepage?, three questions, no marketing vocabulary

## Claim
A homepage's three load-bearing questions can be reduced to a comprehension test: could a caveman, pre-literate, pre-cultural, pre-marketing-savvy, look at the page and immediately know (a) what you offer, (b) how it will make their life better, and (c) what they need to do to buy it? Failing any one of these is failing the page, regardless of how clever the copy is.

## Mechanism
Marketers, founders, and product teams accumulate vocabulary specific to their category. They write copy that reads as obvious to insiders and as opaque to outsiders. The Caveman Test strips this away by forcing the message through a hypothetical observer with no prior context. If the message can survive that filter, it will survive the busy buyer with five-seconds of attention. If it can't, the cleverness is consuming calories the buyer won't spend.

## Conditions
Holds when:
- The audience is broad and includes first-time visitors with no prior context.
- The page has to convert without the buyer asking for clarification.
- The category has strong jargon that founders default to without realising.

Fails when:
- Highly technical audiences expect technical vocabulary as a competence signal (developer tools, compliance software).
- The page is mid-funnel and the visitor already understands what you do, caveman simplification feels patronising.
- The product solves multiple unrelated problems and the test reduces them to a non-specific summary.

## Evidence
> "Could a caveman look at your website and immediately know what you offer, how it will make their life better, and what they need to do to buy it?"

· see `raw/expert-content/experts/donald-miller.md` line 14.

## Signals
- Homepage rewrite reviews use the Caveman Test as the primary acceptance gate, copy that passes feature-set review but fails the caveman test goes back.
- Conversion analytics improve after Caveman-Test-driven rewrites compared to before.
- Founders / PMs can run the test on their own pages without coaching, the test is internalised, not delegated.

## Counter-evidence
Anthony Pierri's Five-Second Trinity is a more granular alternative, same intent (immediate comprehension), but adds the *named alternative* alongside use-case and result. Caveman Test alone may pass even when the page fails to differentiate from competitors.

## Cross-references
- `ins_miller-survival-value-messaging`, `ins_storybrand-customer-is-hero`, the StoryBrand stack.
- `ins_homepage-five-second-trinity`, Pierri's more granular homepage diagnostic.