It is actually quite easy to know who Satoshi Nakamoto is.

The problem is, that would you consider Satoshi an individual or a group? Is knowing the people behind/with Satoshi as important as knowing who Satoshi is?

All you had to do is be there, when all these papers were flying about. All the pieces are scattered about, all you have to do is assemble the puzzle.

I feel that McAfee is feeling his age, and knowing the age of Satoshi, he is trying to prod him into making public before kicking the bucket.