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Table 3 Basic operations in Boolean/fuzzy algebra and definitions of quality check instruments, according to [38]

From: Acceptability of innovative biomass heating plants in a German case study—a contribution to cultural landscape management and local energy supply

Operations and terms Definition
* Logical AND
+ Logical OR
Outcome in upper-case letters (Y) Positive outcome (= acceptance)
Outcome in lower-case letters (y) Negative outcome (= rejection)
Condition in upper-case letters (e.g. INTEREST) Condition is present.
Condition in lower-case letters (e.g. interest) Condition is absent.
Consistency of necessary or sufficient condition Degree of data being in line with statement of necessity or sufficiency.
Coverage of necessary condition Relevance measure of necessary condition; coverage within the set of all cases.
Raw coverage of sufficient conditions Degree to which outcome is covered by a statement.
Unique coverage of sufficient conditions Degree to which outcome is UNIQUELY covered by a statement.
Solution coverage Degree to which outcome is covered by the all pathways/entire solution term.
Logical remainder A possible logical combination without empirical evidence.
Conservative solution term Solution term without assumption about logical remainders.