When widely followed public figures feel free to say anything, without any fact-checking, we have a problem. It becomes impossible for a democracy to think intelligently about big issues — deficit reduction, health care, taxes, energy/climate — let alone act on them. Facts, opinions and fabrications just blend together. But the carnival barkers that so dominate our public debate today are not going away — and neither is the Internet. All you can hope is that more people will do what Cooper did — so when the next crazy lie races around the world, people’s first instinct will be to doubt it, not repeat it.