“Know how to solve every problem that has been solved.”“What I cannot create, I do not understand.”— Richard Feynman
Tech Tree
Tree
The whole site as one prerequisite graph, flowing left → right from foundations (roots)
to frontier. A line means "learn this first." Hover a node to light the path that
leads to it; click to open it — a built course unfolds its skill tree right
here, everything else links into its dissertation-depth pages.