Decidability of Description Logics with Transitive Closure of Roles
This paper investigates Description Logics which al- low transitive closure of roles to occur not only in con- cept inclusion axioms but also in role ...
IN112 Mathematical LogicValidity of an argument can be defined: in model theory: is the conclusion true when premises are? in proof theory: does the argument respect some rules? classical determinate truth i - University of OxfordThe validity of the argument depends on the assumption that a disjunction is true if one of its disjuncts is true, as stated by Ockham in the second quote above ... NATURAL DEDUCTION IN PROPOSITIONAL LOGIC - DiTextThese lines constitute a valid derivation of the conclusion from the premises because each line is a substitution instance of a valid argument form. These ...
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