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Nobel laureate John F. Nash familiarised us with ' game theory ' - a distinct and inter-disciplinary approach to the study of human behaviour . The format for the string is a comma - separated list of flags , with ' + ' before each flag to be enabled and ' - ' before each flag to be disabled . Three of these compounds are unusual 2 ' - oxo-8.1 ' - neolignans , while the fourth is of the more common 6 ' - oxo-8.3 ' - neolignan variety . ' All right , we're going to die , but let 's die for a reason ' - - like this . Once computed , the DSI points to the EU as the worst ' offender ' - - just barely beating out the US .