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: Joseph is not playing tennis. Joseph is playing tennis or it is windy. William is making tea. If William makes tea, then David is driving a car.
David is driving a car can be inferred via the modus ponens rule. It is windy can be inferred via the disjunctive syllogism rule. Joseph is not playing tennis and William is making tea can be inferred via the conjunction rule. William is making tea and Joseph is not playing tennis can be inferred via the conjunction rule.