Why idea validation gave me false confidence

I kept seeing the same pattern over and over, including in my own projects.

Ideas weren’t failing because founders didn’t work hard enough. They failed because validation collapsed into a single vague question: “Is this a good idea?”

That question creates false confidence early and confusion later. You feel productive, you get some positive feedback, but when traction doesn’t show up, it’s unclear what actually went wrong or what to change next.

What changed for me was treating validation as assumption testing, not idea judging. Instead of asking whether someone likes an idea, I started asking which assumption would kill it fastest. Demand, urgency, audience, willingness to pay. Each one points to a very different next move.

I recorded a short video breaking down how I now think about validation, why so many founders validate in ways that feel productive but don’t surface the signals that actually change decisions, and what a better early test looks like.

▶️ https://youtu.be/6ibwUVh4jAc

Curious how others here approach this. When an idea doesn’t get traction, do you usually know why it failed, or does it just feel like general lack of interest?