The word "rational" means thinking and acting in a logical and sensible way, based on reason and evidence rather than emotions or beliefs. Full definition
Silence = support, at least in the court of rational thinking people. (religion.blogs.cnn.com)
It must stand at the service of rational thought as a necessary or completing element in the search for an optimistic and ethical world view. (religion-online.org)
Divorce mediation is the best alternative for rational people whose goal is to get out without hurting each other. (divorcesource.com)