 More recently, researchers have started paying attention to consideration (ii), looking at the extent to which NMLs have generated well-behaved relations of logical consequence. As  Makinson (1994)  points out, practitioners of the field have encountered mixed success. In particular, one abstract property, Cautious Monotony, appears at the same time to be crucial and elusive for many of the frameworks to be found in the literature. This is a fact that is perhaps to be traced back, at least in part, to the above-mentioned tension between the requirement of material adequacy and the need to generate a well-behaved consequence relation. 