However, in many places and disciplines coursework now plays a much more important role even in the classical model of PhD education. In Europe the single supervisor is also often replaced by a three- or four-person supervising committee, backed up by more active departmental tutelage of all their PhD students as a group. Here socialization into the discipline is semi-formalized and more collectively organized. And learning how to become a professional author is somewhat more a matter of sitting in repeated research seminars, interacting with lots of different staff members, getting reactions to trial papers from seminar colleagues, and again receiving oral and written comments on draft chapters from the supervisory committee. Normally in European universities the several supervisors are also examiners in its final stages, with the job of deciding whether the student's final thesis should be accepted as a doctorate. They thus have an advisory/supportive role but also a regulatory/evaluative role. It can be hard for them to reconcile and manage the two roles together.