Cantes de ida y vuelta -- A first story -- How do negotiations about traditional knowledge arise in the first place? -- UN talk on traditional knowledge : the Brundtland Report and the Earth Summit -- The Convention on Biological Diversity -- International indigenous declarations -- Traditional knowledge regimes as figments of different imaginations -- National legislations -- Traditional knowledge and nationalism -- Extreme diffidence and the rise of esoteric knowledge -- Contracts, associations, projects -- The Krahó imbroglio : legitimacy, mirroring, collectivities and pragmatic understanding -- The frog story -- The biochemist's story -- The ethnographers' story -- "Culture" vs. culture -- Reflexivity and its effects -- Regimes of knowledge -- Our own regime of knowledge -- "Culture" talk, Kastom talk -- "Culture" and culture belong to different realms