1] in FG terms) of the adjectival predication `not (be disruptive)'; as such, its denotation type would be that of a "second-order" entity, a type that is compatible with the range of entity types denotable
by this pronoun (as  indicates).
This stratification is possible because of the distinction between data types and phrase types (or between storable and denotable
values) in Algol.
Since all lower sets in [[Sigma]] are denotable
by a formula in L([Sigma]) this can be established by proving that an inclusion between the interpretation of two formulae corresponds to a logical entailment between the two formulae in the formal system.
Traits, characteristics, or human qualities are relatively meaningless unless they can be anchored to some kind of denotable
behavior (Brandt, 1981).
Of these criteria, two basic ones will be used for classifying current research on intervention: (1) whether the interventions--the independent variables or treatments--are empirically denotable
and can be reliably enacted by practitioners (these features would enable implementation of interventions with integrity [Yeaton & Sechrest, 1981] and, hence, replication in subsequent studies and in practice) and (2) the extent to which the outcomes against which the effectiveness of interventions is assessed were measured with sufficient specificity to allow reliable replication.