Extension can shift purely from changing concept structure, not intension.

Evidence

It is important to realize that unlike figure 9.1, in figure 9.2 the intension has not changed in terms of the number of defining dimensions. What has changed is the concept structure. In figure 9.1 intension was changing as one added new defining features. So while the two figures show the same pattern, we get there in very different ways: one by changing the intension but keeping structure constant, the other by keeping intension the same and changing the structure. — Gary Goertz, Social Science Concepts and Measurement, 1435

Categorization

• DEFINE: Separates two mechanisms for widening a concept: adding defining dimensions versus re-connecting existing ones with AND/OR.