One-of-n and n-of-n rules define opposite poles of conceptual inclusion

Evidence

The clearest example linking the m-of-n rule to the best shot is the 1-of-n rule: if one of the dimensions is present then it is a member of the family. The presence of one substitutes for the absence of all the others. At the other end of the spectrum, to require n-of-n means that each is necessary. — Gary Goertz, Social Science Concepts and Measurement, 1430

Categorization

• DEFINE: Names the two endpoints — complete substitutability (best shot) and strict weakest-link necessity — that structure the whole typology.