There are two points about that. Clearly we can choose our experts according to our own predelictions. There is substantial expert opinion on the other side of the argument as there is on fluoride. If the situation is as clearcut as the hon. Gentleman suggests, perhaps he will explain why the United States and the Soviet Union have taken policy measures which have had for them economic disadvantages similar to those likely to be suffered by this country. Plainly they have been sufficiently convinced about the medical risks to take the necessary policy decisions.