What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? Name the inference rule being used: It is overcast. Linda is running or Joseph is a mechanic. Linda is not running.
Joseph is a mechanic can be inferred via the disjunctive syllogism rule. It is overcast and Linda is not running can be inferred via the conjunction rule. Linda is not running and it is overcast can be inferred via the conjunction rule.