Table 1 The basic nomenclatures in use: ‘Weak/Strong dual necessity,’ OR/AND logical structure.
From: Experimenting with a strong dual necessity approach to social progress
The ‘logical structure’: how the two components of a shared concept complement each other. | The functional representation of the logical structure in this research. | |
‘Weak dual necessity’ | The OR structure (Goertz, 2020): The two components represent the concept and can compensate one for a lack in the other. | A CES function using a high degree of substitution. |
'Strong dual necessity’ | The AND structure (Goertz, 2020): the two concepts represent a shared basic concept as necessary conditions when one cannot compensate for the other. | A CES function using a very low degree of substitution. |
