Analysts routinely present unstructured dimension lists while assuming a necessary-and-sufficient default.

Evidence

In short, it is quite common for an analysis of the secondary-level dimensions of a concept to be given, but quite often this list has no structure. That the necessary and sufficient condition structure has been the standard for over 2000 years could lead to the reasonable view that in the absence of discussion the necessary and sufficient condition structure is the default structure. — Gary Goertz, Social Science Concepts, 256

Categorization

• DEFINE: Explains what the ‘default’ necessary and sufficient condition structure is and why it is presumed absent explicit discussion.
• QUESTION: The passage promises that ‘things are not so simple’ — worth chasing what alternative structures are actually in play.