Consider the premise. Does the hypothesis directly oppose it? Premise: The day may well come, as Barlow and Dyson seem to believe, when book publishers as we know them will disappear. Hypothesis: Barlow and Dyson believe that book publishers may disappear.
The day may well come, as Barlow and Dyson seem to believe, when book publishers as we know them will disappear.###Barlow and Dyson believe that book publishers may disappear.