Rachel has another one about why numbers (quantity) versus who/what (quality) is probably a better measure of authority. Once upon a time one person said the sun was the centre of the solar system. Once upon a time one person said there was a general theory of relativity. Once upon a time many people said Jews, gypsies and homosexuals could be executed on an industrial scale. Extreme examples sure, but in each case if you looked around to see what everyone else was saying, you would have been wrong. Louisa with a tale about vitality and news, which is also why lots of people saying the same thing doesn’t equal it’s true. Mia with another story of how it is not hard to trick people if you address them the right way (and it isn’t). Evan on common sense (it goes a surprisingly long way, and is also so easily dissolved), and finally Kelsey has an excellent list of things to pay attention to.