And what it turned out was going on was that Facebook was looking at which links I clicked on, and it was noticing that, actually, I was clicking more on my liberal friends' links than on my conservative friends' links.
I el què havia ocorregut era que Facebook estava controlant sobre quins enllaços feia clic, i estava descobrint que, de fet, feia més clics als enllaços dels meus amics progressistes que als enllaços dels meus amics conservadors.