Unanswered questions
In this sense, we have a bunch of unanswered questions
What’s “approximately computable” -- everything?
- can we somehow get around undecidability in our own brains?
More to the point-- what’s efficiently computable and what isn’t-
- is asymptotics the right way anymore- bounded problems (albeit with n very large)
What are the space issues- not just with answering problems, but with encoding the “computer” in the first place
- The human brain weighs 3 pounds- are its computational elements set up more efficiently for the tasks it solves than a digital computer is?