The more uncertainty, the more we cling to uncertainty reduction, such as predictive technologies (data science, AI) and futurologists, who promise a technological heaven on earth, even though we now really know that every new technology brings about a world of new uncertainties (or downright problems). Though born out of doubt, good science always raises more questions. Complacency with one 's own certainties invariably betrays that there is no room for uncertainties, and that for individual exceptions you can count on nothing but the “standard procedure”. Attention and individual customization cannot be bought off with quality marks. Certainties concern everything in general and often nothing or no one in particular. Certainty is not for sale, except the certainty that we have to manage with … uncertainty.