[pron]

But there will surely be other Feynmans and Einsteins. What difference does it make if that's the same person? Also, why do you assume that we'll acquire more knowledge than we already have? It makes sense to think (as the human brain is a huge energy sink), that our brains are just large enough to process information for one human lifetime. I don't remember most of what I learned at university, and that wasn't even two decades ago.