Startup Validation term
Fake door test: meaning, examples, and AI prompt use.
Measures real interest in an offer before building the full product.
What it means
Plain meaning
smoke test: Measures real interest in an offer before building the full product.
Aliases
smoke test, painted door test, demand test
People say / experts say
People usually say
- fake door
- smoke test
- test demand
- idea validation
- validate before building
- landing page signup
Experts usually say
Fake door test, Problem-solution fit, Evidence standard, Value proposition
When to use it
Use it when
Your rough ask sounds like: fake door, smoke test, test demand. The term gives your research assistant a clearer problem shape.
When not to use it
Do not use this term to seek approval for an idea. Use it when you need evidence, assumptions, decision criteria, or behavior-based learning.
Copy-ready handoff phrase
Before and after
Weak ask
Validate this fake door.
Exact Terms ask
Use a fake door test to measure demand before building: offer the feature, track intent, and disclose honestly when needed.
Prompt templates by use case
Research prompt
Turn this idea into research using Fake door test and adjacent concepts: Problem-solution fit, Evidence standard, Value proposition. Separate assumptions, evidence, and decision criteria.
Interview prompt
Write behavior-first customer questions that test Fake door test without leading the participant.
Decision prompt
Define the evidence required to decide whether Fake door test is strong enough to continue, change direction, or stop.
Common mistake
What goes wrong
Asking whether an idea is good before defining the assumption and evidence standard.
Better move
Use Fake door test with the related vocabulary trail: Problem-solution fit, Evidence standard, Value proposition.