They did not realize that every time black men thought they had found a loophole in the closed society, a way to accomplish this, that loophole was quickly plugged by the consent of all white society. For example, we did not see WHITE ONLY signs on the doors of libraries (where we could find learning and books), but we knew we had better not try to enter one. We saw no WHITE ONLY signs on the doors of schools or universities, but we knew it was suicidal to try to enter one.