# The Mom Test, Applied: Customer Conversations That Don't Lie > The Mom Test in practice: its three rules, the three kinds of bad data, better questions to ask, and how to check the calls you already recorded. --- [Skip to main content](#main-content)Strategy # The Mom Test, Applied: Customer Conversations That Don't Lie to You The Mom Test in practice: its three rules, the three kinds of bad data, better questions to ask, and how to check the calls you already recorded. cl **ClosedLoop AI Team**Nov 3, 2026 · 6 min read [LinkedIn](https://www.linkedin.com/sharing/share-offsite/?url=https%3A%2F%2Fclosedloop.sh%2Fblog%2Fthe-mom-test-customer-conversations)Copy link On this page - [The three rules of The Mom Test](#the-three-rules-of-the-mom-test) - [Bad questions, and The Mom Test versions](#bad-questions-and-the-mom-test-versions) - [Compliments, fluff and ideas](#compliments-fluff-and-ideas) - [Is your last call Mom Test clean?](#is-your-last-call-mom-test-clean) - [The Mom Test works in reverse](#the-mom-test-works-in-reverse) - [Where ClosedLoop AI fits](#where-closedloop-ai-fits) [Customer Conversations](https://closedloop.sh/tag/customer+conversations)[Product Discovery](https://closedloop.sh/tag/product-discovery)[Voice Of The Customer](https://closedloop.sh/tag/voice+of+the+customer)[Product Insights](https://closedloop.sh/tag/product+insights)Key takeaways - The Mom Test says that everyone will lie to you about your idea if you ask the wrong question, kindly and without meaning to - Its three rules are to talk about their life instead of your idea, to ask about specific past events instead of opinions about the future, and to talk less - Compliments, fluff and ideas are the three kinds of bad data, and most call notes are full of them - The same rules work in reverse: they tell you which parts of the calls you already recorded to trust The Mom Test is a thin book with an unusually useful idea. Rob Fitzpatrick published it in 2013, and the title explains the whole thing. Ask your mom whether your business idea is good and she will say yes, because she loves you. She is not lying on purpose. You asked a question that only has one kind answer. Fitzpatrick's point is that every customer becomes your mom the moment you ask about your idea. People are polite, they want to be encouraging, and they have no idea what they would do in a future you describe. So they guess, warmly. Then you write the guess down as validation and build on it. So stop hoping for more honest customers, and ask questions even your mom could not lie about. ## The three rules of The Mom Test The book boils down to three rules: - **Talk about their life instead of your idea.**Their problems, their week, their workarounds. - **Ask about specifics in the past instead of generics or opinions about the future.**"When did this last happen?" beats "Would you use this?" every time. - **Talk less and listen more.**Every minute you spend pitching is a minute you are not learning. Notice what the rules have in common. Each one moves the conversation away from what the customer thinks and toward what the customer did. Behavior is hard to fake, and opinions cost nothing to give. ## Bad questions, and The Mom Test versions Instead of asking Ask Why it works "Would you use a tool that does X?" "When did this last come up? What did you do?" Past behavior beats predicted behavior "How much would you pay for this?" "What does this cost you today, in time or money?" A real cost is a fact, a price is a guess "Do you think this is a good idea?" "Talk me through the last time this happened." Nobody can be polite about a story "Would feature Y be useful?" "Why do you want that? What would it let you do?" The reason behind a request is the real requirement "Is this a big problem for you?" "What have you tried to fix it?" People who never tried to fix it do not have the problem The last row is the sharpest filter in the book. If a customer calls something a huge pain but has never looked for a solution, built a spreadsheet or complained to anyone, it is not a huge pain. A homemade workaround, on the other hand, is better evidence than any survey. ## Compliments, fluff and ideas Fitzpatrick names three kinds of bad data that sneak into conversations and get mistaken for learning. **Compliments.**"That's really cool." "I love it." They feel like progress and tell you almost nothing. When you hear one, steer back to their workflow. **Fluff.**Generic claims ("I usually"), hypotheticals ("I would") and promises about the future ("I will"). Listen for the verbs. Fluff lives in "usually", "would" and "will". Facts live in the past tense: "last Tuesday I", "we tried", "it cost us". **Ideas.**Feature requests and suggestions. They are valuable, just not as instructions. Treat each one as a clue to dig into: what would that let you do, and how are you coping without it? A call that fails The Mom Test "Would you use something like this?" "Yeah, definitely, that would be great." Logged as: strong interest Nothing anyone can act on A call that passes it "When did reconciling invoices last go wrong?" "Two weeks ago. We lost a day rebuilding a spreadsheet." Logged as: one lost day per incident, spreadsheet workaround A real problem with a real cost ## Is your last call Mom Test clean? Open your notes or recording from your most recent customer call and check: - **Did you describe your idea before you heard about their problem?** - **How many of your questions contained "would" or "will"?** - **Did you write down a compliment as a positive result?** - **Can you name one specific past event the customer described?** - **Did the call end with a commitment,**like a next meeting, an intro, a trial or access to data? Two or more misses means the call probably taught you less than it felt like it did. That is normal. Almost everyone fails these checks until they start running them. ## The Mom Test works in reverse Here is the use of the book most teams miss. The same rules that help you ask better questions also tell you which parts of past conversations to trust. Your company already holds hundreds of recorded customer calls: sales demos, onboarding sessions, renewals, support escalations. Most of them were never designed as research, and most of them are full of compliments and fluff. Hidden inside them are the exact things The Mom Test teaches you to look for: specific past events, real costs, homemade workarounds and commitments. So read your recordings the way Fitzpatrick tells you to run an interview. Discount every "that would be great". Pull out every "last month we". When the same workaround shows up in a dozen accounts, you have found a problem worth solving, and nobody had to schedule an interview to find it. It is also the most dependable way to hear whether you are getting close to [product-market fit](https://closedloop.sh/blog/product-market-fit). If you do want to run fresh interviews, our guide to user interview questions that get honest answers puts these rules into a ready list. ## Where ClosedLoop AI fits Because ClosedLoop AI has read the sales calls, onboarding sessions and support threads you already recorded, The Mom Test becomes a way of reading all of them rather than a habit for the next interview. With [Ask anything](https://closedloop.sh/features/ask-anything)you can ask: - "Which customers built a workaround for invoice reconciliation, and what did it cost them?" - "Where did a customer describe a specific incident with our exports in the last 90 days?" - "Who committed to a pilot or an intro after a demo, and what did they ask for?" Every answer comes back in plain prose with each claim quoted, sourced and dated to the customer who said it, so you can tell a past-tense fact from a polite "that would be great" at a glance. When the evidence is not there, the answer says so. [See Ask anything](https://closedloop.sh/features/ask-anything)or [book a demo](https://closedloop.sh/demo). ClosedLoop AI Team We build tools that turn customer conversations into product decisions. ClosedLoop AI analyzes feedback from 44 native integrations to surface the insights that matter. [More about ClosedLoop AI →](https://closedloop.sh/) ### Get insights like this in your inbox Product insights delivered weekly. No spam. Unsubscribe anytime. Leave this field blank Subscribe Related ## More you might find useful [Strategy Nov 2, 2026 ### Product-Market Fit: How to Tell You Have It From What Customers Say Product-market fit shows up in what customers say long before it reaches a dashboard. Here is how to hear it in your own calls, one sentence… 6 min read →](https://closedloop.sh/blog/product-market-fit)[Strategy Oct 21, 2026 ### What Is a Product Builder? 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