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: If Thomas were a writer, then Michael is sleeping. Thomas is a writer or Michael is not sleeping. Thomas is not a writer.
Michael is not sleeping can be inferred via the disjunctive syllogism rule. If Michael sleeps, then Thomas is a writer can be inferred via the rewriting rule.