 their civil rights, their civil liberties. Someone who believes we can break through the stalemate and suspicions that grip us and our policies abroad. If that is what they mean by a liberal, I'm proud to say I'm a liberal. John Fitzgerald Kennedy. Carl Sagan. In science, it often happens that scientists say, you know, that's a really good argument. My position is mistaken. And then they would actually change their minds. And you never hear that old view from them again. They really do it.