Let’s face it, there are few pursuits more quixotic than that of journalistic objectivity. The preview screening of the documentary movie Cape Spin: An American Power Struggle in Oak Bluffs on Tuesday night provided a perfect illustration of the point.

For 84 minutes, the film explored the issues involved in the controversial Cape Wind development. Then for another hour or so its makers were subjected by audience members to a torrent of claims and counterclaims about their objectivity.

Wind, tides and sun are intense subjects for discussion on the Island these days and it’s not all talk about the weather. Alternative energy projects are under way on so many fronts, both private and public, that it is sometimes hard to keep track of them all. But the Vineyard is moving ahead on three projects independently to generate electricity for its own needs, beginning with wind farms.