A Horn clause is a disjunction of literals containing at most one positive literal. It can be read as an implication whose antecedent is a conjunction of variables.
A Horn clause is a special type of logical expression used in propositional logic and predicate logic that has important applications in computer science, particularly in logic programming and automated theorem proving. A Horn clause is defined as a disjunction of literals (which can be either a positive or negative atomic proposition) with at most one positive literal.
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