science's rationality claim to be able to investigate objectively the hazardousness of a risk permanently refutes itself. It is based , firstly, on a house of cards of speculative assumptions , and moves exculusively within a framework of probability statements , whose prodnoses of safety cannot even be refuted , strictly speaking, by actual accidents. secondly , one must assume an ethical point of view in order to discuss risks meaningfully at all. Risk determinations are based on mathematical and social interest , especially, if they are presented with technical certainly. In dealing with civilization's risks ,the sciences have always abandoned their foundation experimental logic and made a polygamous marriage with business, politics and ethics - or more precisely , the live with the latter in a sort of "permanent marriage without a license