 Others think that the Ramsey test is perfectly all right. Some authors argue that the right reaction is to say that conditionals should not be analyzed by AGM-style revisions, but rather by updates in the style of Katsuno and Mendelzon (1992). Members of this party include Ryan and Schobbens (1997), Grahne (1998) and Crocco and Herzig (2002). Updates in this sense are closely related to Lewis’s (1976) imaging (see  section 5.3.2  above). These operations violate the AGM-postulate (\(*\)4) and the Principle of Preservation, but satisfy the following Monotonicity condition which is immediately entailed by GRT: