> There are only 6.6 billion people in the world, so you only need 33 bits (more precisely, 32.6 bits) of information about a person to determine who they are.

> There are only 6.6 billion people in the world, so you only need 33 bits (more precisely, 32.6 bits) of information about a person to determine who they are. I think you should count the dead as well. But then, 33 bits ~= 8 billion, which should still be enough, I guess.