Constitutional doubt

"The writers of the Constitution knew of the value of doubt. In the age that they lived, for instance, science had already developed far enough to show the possibilities and potentialities that are the result of having uncertainty, the value of having the openness of possibility. The fact that you are not sure means that it is possible that there is another way some day. That openness of possibility is an opportunity. Doubt and discussion are essential to progress. The United States government, in that respect, is new, it's modern, and it's scientific." - Richard Feynman