Learn Any Field 10× With AI — Wide and Deep, Without Fooling Yourself

A mental model a 12-year-old can run — Map (width) · Ladder (depth) · Gate (proof) — mapped term-by-term to the cognitive science (Gick & Holyoak, Chase & Simon, Roediger & Karpicke, Ericsson, Bjork). Defines 'better' as a verified result, not a warm feeling, and names the con artist in the lab coat: the illusion of competence.