Lack of knowledge creates uncertainty, and numbers alone do not reduce uncertainty. Numbers are nothing more than what we use to communicate some kinds of easily compressible data.
You want other people to tell you that you’re wrong, and you want to probe that judgment through conversation.
You are not seeking approval or a pat on the back. A focus on why your idea is good will likely result in your getting little or no information.
From the book, Innovating: A Doer’s Manifesto for Starting from a Hunch, Prototyping Problems, Scaling Up, and Learning to Be Productively Wrong by Luis Perez-Breva