It was a good night at the opening of the Turner Prize 2015 at Tramway in Glasgow last night. Still trying to compute the detail of the shows and the practices of the nominees and, like many, will go back and try to think that all through. But this digital punt is triggered in part by something that seems computable in advance of a fuller comprehension of the components of the show. And that something is a something that surfaces on all occasions when Turner Prize-like art is spoken to in mainstream media. That something is this: in advance of fuller comprehension of works and practices we can compute and agree now that this prize and the kind of art that it showcases is…