If a haystack gets big enough, the odds only increase that there will be a few needles hidden inside. Whatever they managed to find, they made the most of: in closing arguments, for instance, Cochran compared Fuhrman to Adolf Hitler and called him “a genocidal racist, a perjurer, America’s worst nightmare, and the personification of evil.” His only real audience was the jury, many of whom had good reason to dislike the Los Angeles Police Department, but the team managed to instill considerable doubt in lots of Americans tuning in on TV as well. That’s what happens when you spend week after week dwelling on the cracks in a case, no matter how small they may be.

Similarly, the immense pile of evidence now proving the science of global warming beyond any reasonable doubt is in some ways a great boon for those who would like, for a variety of reasons, to deny that the biggest problem we’ve ever faced is actually a problem at all. If you have a three-page report, it won’t be overwhelming and it’s unlikely to have many mistakes. Three thousand pages (the length of the latest report of the Intergovernmental Panel on Climate Change)? That pretty much guarantees you’ll get something wrong.