If you were put on an island by yourself, you could never die, and you weren’t allowed to leave until you built a fighter jet from scratch, how long do you think it would take you?
You would have no books or outside help, only your current knowledge, meaning you would have to re-discover thousands of years of human progress by yourself. You would have to teach yourself to mine for resources, re-discover electricity, re-discover flight, and probably thousands of other things you would need to know. Before you could even think about building the fighter jet, you would need to build the tools to make it!
My guess is that it would take 2 billion years for ME to do it. How long do you think it would take you?
Also, credit to Mason Woodside for coming up with idea with me.