Others have stressed the domain of knowledge-the cognitive domain. Jerome S. Bruner wrote: "The structure of knowledge-its connectedness and its derivations that make one idea follow another-is the proper emphasis in education";Robert L. Ebel championed cognitive learning;and Philip H. Phenix said: “My thesis, briefly, is that all curriculum content should be drawn from the disciplines, or to put it another way, that only knowledge contained in the disciplines is appropriate to the curriculum.