Abstract and keywords
Abstract (English):
In the formal model of the binary sufficient cause theory two definitions of a notion “joint action of k factors in a given outcome” are known. One of them appeals to a logical structure of the outcome, and another uses some formal notions of Boolean algebras theory. We discuss peculiarities of either definition and formulate their equivalence statement.

Keywords:
sufficient cause theory, Boolean algebra, Boolean functions, DNF, propositional logic, Boolean cube, prime implicant, outcome, irredundant DNF, causality in epidemiology.
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