I was rereading parts of The Mom Test, and it reminded me how easy it is to mistake politeness for validation.
Someone says the idea sounds useful, they like the direction, they would definitely try it, and maybe they even suggest a few features. It feels like progress, but sometimes they are just being nice.
The dangerous part is that polite feedback does not feel negative. It gives you just enough confidence to keep building without proving whether the problem is actually painful.
I think the harder skill is learning to ignore compliments and look for behavior instead.
