A client asked for a blueprint on a napkin and I almost took it seriously.
Honestly, the absurd request made me realize I prefer quick sketches over formal drafts for first meetings. Most drafters would call me crazy, but it cuts the talk and gets to the point.
Hold up, I gotta push back a little. The napkin test is great for a core concept, but some really complex, good ideas need more room to breathe. Ben_gibson might be onto something calling it "the ultimate test" a bit much. A simple sketch can't always capture the needed details for something big, you know? It's a solid starting filter, but not the only one.