A sufficiently detailed record of a person's behavior could be used to fully reconstruct their psychology. This might constitute a form of immortality, but even if it doesn't, complete knowledge of the past would be a beautiful thing to have, it would make the future richer to know its past and to be able to bring back faithful replicas of the people who built it.
So this is an important question. To produce sufficiently detailed records... is that already happening by default? Is the ad industry already keeping all of that stuff? Will it all eventually make its way to light?
I've been assuming it's happening. Storage is cheap. The data has lots of buyers.
If not, then I'm going to need to start recording and backing stuff up more thoroughly.
What you have in mind is "A sufficiently detailed record of a person's behavior when interacting with the computer/phone"
How is that sufficient to any reasonable degree?
A minor example... I'm fairly sure you can make guesses about what kinds of expressions a person makes a lot from a few photos of their face. I'm not sure what else to point at to convey this intuition, but I seem to believe that behaviors in very different contexts leak information that'll all become apparent with enough data.
I guess I can believe that there are probably a lot of people who don't output enough content for this to work, maybe even among the users of this forum, but I don't think it's a large proportion of them.