I think that many of my ideas are correct, but I'll bet you, before my death other discoveries will be made that will prompt me to alter various ideas I have about human evolution.
The message has become clearer to the nation about AIDS. People used to think they could catch it all kinds of ways, but we now know that it is absolutely passed through bodily fluids.
American society as a whole can never achieve the outer-reaches of potential, so long as it tolerates the inner cities of despair.

