Excluding positive cases reveals scope conditions rather than the Possibility Principle

Evidence

For example, in her study of social revolutions, we know that Skocpol uses scope conditions because she excludes positive cases of social revolution like Cuba 1959. If she were exclusively using the Possibility Principle, she would have no basis for declaring positive cases where social revolution is obviously possible as irrelevant to her theory. — Gary Goertz, Social Science Concepts, 1219

Categorization

• XREF: Illustrates the diagnostic test from the preceding paragraph with Skocpol’s own case selection.