 In debate, monists have often been willing to grant this assumption to the pluralists, because they have assumed that their preferred logic is right and the rival logic wrong, not that they and their rivals were talking past each other. Still, the suggestion was famously made by Quine (1986, 81) that in a dispute between rival logicians “neither party knows what he is talking about” since they cease to be talking about negation as soon as its core logical properties are seriously questioned (in Quine’s example the logicians argue about whether sentences of the form A∧¬A can be true.) 