 the ethics and morals of his times when it came to issues like slavery. But he was really open-minded. He had a scientist temperament, an empirical temper. He was always testing his own ideas. And he gave this famous speech at age 81, I believe it was, at the Constitutional Convention in Philadelphia, closing remarks, which said basically, you know, this document, the Constitution is not perfect, but I don't know if it'll ever be perfect. And I have problems with it. But as I get older, I begin to doubt my convictions more.