Family resemblance concepts hold when at least one dimension is present.

Evidence

The family resemblance structure in the two-dimensional case is the idea that we categorize the object into the family if X1 or X2 or both are present. Recall that the family resemblance approach has sufficiency without necessity so X1 can substitute for X2, and vice versa. Here we have the m of n rule in action: if at least one of the two dimensions is present then it belongs to the concept. — Gary Goertz, Social Science Concepts, 270

Categorization

• DEFINE: Explains that family resemblance means sufficiency without necessity, i.e., substitutable dimensions.
• XREF: Links to Wittgenstein’s family resemblance and Rosch prototype theory in cognitive science.