Andrew Sullivan recently wrote a series of 
posts on the 
subject of 
light obscuring people's ability to see the 
night sky -- and then announced, as if it were a revelation:
Who knew? There is an organization dedicated to "giving back the night."
Now, the International Dark-Sky Association happens to be celebrating its 
20th anniversary this year, and the fact that there's a "dark sky" movement isn't all that obscure. But so be it -- bloggers often learn about their subjects as they are writing about them. Still, it's a bit much that Sullivan's 
very next post, criticizing Jonah Goldberg, contains this bit of snark:
Philosophy is easy when you know nothing about it, isn't it?