Countless works in the social sciences reveal the inability of their authors to bear in mind the crucial difference between what may properly be called the logic of discovery and the logic of demonstration. The second isproperlysubjectto rules and prescriptions; the first isn't.

-Nisbet, Robert
  Sociology as an  Art Form, introduction.

Napoleon had commanded that once a week there should be held something called a Spontaneous Demonstration.

-Orwell, George pseudonym of  Eric Arthur Blair
  Animal Farm, ch.9.