A major point of divergence come up from the Spur group during The Fourth SI Conference in London (December 1960). The discussion of a report by Attila Kotányi, leads to posing the question: "To what extent is the SI a political movement?" Various responses state that the SI is political, but not in the ordinary sense. The discussion becomes somewhat confused. Debord proposes, in order to clearly bring out the opinion of the Conference, that each person respond in writing to a questionnaire asking if he considers that there are "forces in the society that the SI can count on? What forces? In what conditions?" This questionnaire is agreed upon and filled out. When, a day later, the Spur members present a joint response to the questionnaire, in which they reject the concept of a proletarian revolution, it generates a sharp debate: