Suppose humanity were set back to the stone age. In the sense that all working technology is 100% destroyed into ash. We don't even have a proper hammer or knife. What we do have is written documentation about how the modern world works, and an army of the brightest engineers.
How long would it take to re-create modern tech? And with the documentation/academic papers we currently have, could we even do it? What I mean is, what are all the steps we need to take from building a forge out of mud and flint and steel, to producing an i9 intel chip, 5g networks and space ships?
Think of this as an ansible script that bootstraps cavemen to modernity.