Feyerabend was referring to a seminar series he ran while teaching at Zurich university. One of the invited speakers was Freidrich Dürrenmatt. He
…came to speak on Platonic entities, and used a chair instead of a bed as an example. His conclusion: the Platonic chair is nothing but the idealised hind end of the sitters. Dürrenmatt had been warned that there would be other talks and that he had to restrict himself to twenty minutes. ‘Oooch’, he replied. ‘I won’t know what to say anyway, I won’t talk for more than ten minutes.’ He was late, and we started without him; when he arrived, he produced a huge manuscript and would have gone on forever if he hadn’t been stopped after twenty-five minutes. (Mrs Huber, who was chairing the meeting, hestitated to interrupt, but I, sitting next to her, egged her on: ‘No exceptions for big shots!’) Dürrenmatt didn’t say a word. He came to dinner with us afterward, tried to get me drunk, told me he had read Against Method, and entertained us with stories about himself and Hohler. But he refused to come again. ‘You don’t let a person finish!’ he yelled at the organiser when he next rang him – and hung up.