Paul Graham, with all his knowledge of the industry, didn’t know that Digg was out there either? It sounds kind of weird to me that he wouldn't... and yet, for

Paul Graham, with all his knowledge of the industry, didn’t know that Digg was out there either? It sounds kind of weird to me that he wouldn't... and yet, for my startup, I also wasn't aware of some very similar projects (and a good thing too, or maybe I wouldn't have started)