David Robert Grimes, a postdoctoral researcher at the University of Oxford, UK, is an adamant defender of science, but the blog post he wrote in August caused quite a stir, even for him. Troubled by an upcoming vote by Dublin City Council on whether to stop fluoridating the city's water supply, in his post he implored councillors to heed evidence that fluoridated water helps to prevent and slow tooth decay. His contention that claims to the contrary are inflammatory, invalid and dishonest prompted critics around the world to call for his resignation, he says

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