I'll share my method for evaluating a problem interview. I didn't invent it; I picked it up somewhere, but I googled it now and couldn't find the author. So, after conducting an interview, you need to categorize people by pain level:

- No problem;
- Problem exists, wants to solve it, but hasn't done anything yet;
- Problem exists, came up with something to solve it, but hasn't done anything;
- Problem exists, spent time or money, but didn't solve it;
- Problem existed, spent time or money and solved it.

You should only work with the last two. Therefore, I consider a hypothesis confirmed only if the respondent mentioned the problem during the interview and somehow tried to solve it. Otherwise, it's not a problem; a person with a problem doesn't wait, they do at least something to solve it. If they only think about it, they will be eternally thinking customers who really want to but never buy. Why do we take the last one who solved the problem? Because we can offer a better or cheaper product, and the consumer already understands what they are paying for; selling to them won't be difficult.