Maybe the same way Google auto fills in your search text before you finish typing it in? Assumption on what you will type?
Otherwise, I don’t know... ;)
Barack
All show up on Barack page
if it was assuming what I type next Obama's fat (_*_) should show up on the wifes page but it doesnt, its still on Obamas page.
the only comments you can see are those of mutual friends, that still does not mean that who ever is responsible for his page cant see them for as much as FB has screwed up their security setting the past couple of days