Seven thousand notebook pages. To-do lists that said things like “measure the city”. And famous projects he never finished. The greatest mind of his age — and a warning about too many open projects.
He filled about 7,000 pages with questions, sketches and to-do lists. One real list says: measure the city walls, ask the gunner about the tower, find out why the sky is blue. Capture everything — decide later. That is the Brain Dump.
Paintings abandoned, machines never built, books never published. Leonardo is the most famous example of what happens without a limit on open projects. DuckDoro caps you at 3 active projects for exactly this reason.
The monastery complained to the Duke that Leonardo kept staring at the wall instead of painting it. The task he avoided — the Last Supper — is the one history remembers. Do the avoided task first.
“Why is the sky blue?” is a wonderful question. It goes on the Ideas Wall, where it is saved but does not push out today's real work.
Sources: Leonardo's surviving notebooks (including the famous Milan to-do list) and early accounts of the Last Supper delays. Details are simplified for illustration.
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