Heidegger combines phenomenology with the hermeneutics of Wilhelm Dilthey. His work focuses on the philosophy of the narrative imagination, hermeneutics and phenomenology. The terms "hermeneutics" and "exegesis" are sometimes (incorrectly) used interchangeably. Research in the humanities involves different methods such as for example hermeneutics and semiotics. He is best known for contributions to phenomenology, hermeneutics, and existentialism. Neomodernists stand against the discrediting of the concept of authorial intent in postmodern hermeneutics. Augustine offers hermeneutics and homiletics in his "De doctrina christiana". Calvin used "brevitas et facilitas" as an aspect of theological hermeneutics. He was best known for combining phenomenological description with hermeneutics. Taken together, both define the term (Biblical) hermeneutics. However, biblical hermeneutics did not die off. Schleiermacher's work has had a profound impact upon the philosophical field of hermeneutics. The study of Revelation is usually divided into four interpretative methodologies or hermeneutics. Legal interpretivism, most famously Ronald Dworkin's, may be seen as a branch of philosophical hermeneutics. Roy J. Howard termed this approach analytic hermeneutics.