Finally, Gadamer's essay on poet Paul Celan (entitled "Who Am I and Who Are You?") has been considered by many—including Heidegger and Gadamer himself—as a "second volume" or continuation of the argument in "Truth and Method". "Truth and Method" is regarded as Gadamer's magnum opus, and has influenced many philosophers and sociologists, notably Jürgen Habermas. In reaction to Gadamer, the critic E. D. Hirsch reasserted a traditionalist approach to interpretation (following Dilthey and Schleiermacher), seeing the task of interpretation as consisting of reconstructing the intentions of the original author of a text. The philosopher Adolf Grünbaum criticized "Truth and Method", maintaining that Gadamer misunderstood the methods of science, and made an incorrect contrast between the natural and the human sciences. The critic George Steiner writes that Gadamer's influential model of textual understanding is "developed explicitly out of Heidegger's concept and practice of language."