I wonder how many have contemplated, with the attention it merits, a deserted street with people in it. This sentence, by its phrasing, seems to want to say something else, and indeed it does. A deserted street is not a street no one walks on, but a street on which people walk as if it were deserted. This isn’t hard to understand, provided one has seen it: a zebra can’t be grasped by a man who doesn’t know more than a donkey.