Amazing, there are lots of things I don't remember. However, I'm pretty certain that I would be able to recall whether I was part of such a well-known organization (in a leadership position no less) at some point in the past 10 years. Roberts isn't saying he was never a member; he's saying he can't remember if he was a member or not. Shouldn't we demand better mental agility from our Supreme Court justices.
Just a thought.