“The Role of Logics in Explicating Culture”. -- Keith Stenning, the distinguished cognitive scientist (and old acquaintance from my Edinburgh days), gave a talk to our extended ERC team yesterday. He presented data to show that much of our mundane reasoning is not in conformity with classical logic but rather with a system of non-monotonic logic called “Logical Programming”. Classical logic is the logic of disagreement, whereas LP logic characterizes co-operative reasoning. He also speculated in Wittgensteinian fashion that we have different logics for different language-games, and that in different cultures different logics have varying levels of importance. He used anthropological material from oracle-use amongst the Mambila to make his case. All this was fascinating even though it remained unclear what consequences -- relativist or anti-relativist -- we should draw from his work.