Time was when I was much interested in the philosophers of the Frankfurter Schule. That was in the 'seventies and 'eighties. Less interested now, I am still intrigued by Adorno's critique of Heidegger. Is it worth anything? For that matter, are Heidegger's ideas worth anything? Let's see.
I will explain one aspect of Heidegger's notorious Seinsfrage, an aspect centering on the role of the copula in predicative sentences/judgments. True-blue Heideggerians may not recognize much of their Master here, but I'm a thinker not an exegete. I will also consider what Adorno has to say in criticism of Heidegger in the section on the copula in Negative Dialektik.
1. Consider a simple predicative sentence such as 'The sky is blue,' or simpler still, 'Al is fat.' The sense of the sentence is built up from the senses of its constituent terms: 'Al' and 'fat' clearly play a role, but what about 'is'? Does it play a semantic, as opposed to a merely syntactic, role? Is 'is' perhaps redundant? 'Al' refers to something, and perhaps 'fat' does as well; does 'is' refer to anything?
