I was surprised by the effect it had on me. I’d assumed that my skepticism and media literacy would inoculate me against such distortions. But I soon found myself reflexively questioning every headline. It wasn’t that I believed Trump and his boosters were telling the truth. It was that, in this state of heightened suspicion, truth itself—about Ukraine, impeachment, or anything else—felt more and more difficult to locate. With each swipe, the notion of observable reality drif...ted further out of reach.