Milton Friedman, The Methodology of Positive Economics

This is a classic article by a Nobel Prize winner economist. Friedman here laid out a program for economic science that set the direction for economics for the rest of the century.

Why is positive economics "positive"? What is the opposite of "positive economics"?

What are the two components of theory?

How do we test a theory and what is a "prediction"?

Why should we not consider the realism of a theory’s assumption?

Why can we assume that tree leaves rational?