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: John is a scientist or it is not windy. If John were a scientist, then it is windy. John is not a scientist.
It is not windy can be inferred via the disjunctive syllogism rule. If it is windy, then John is a scientist can be inferred via the rewriting rule.