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 it is late, then Linda is writing a letter. It is late or Karen is not sleeping. If Linda writes a letter, then Karen is sleeping.
If it is late, then Karen is sleeping can be inferred via the transitivity rule. If Karen sleeps, then it is late can be inferred via the rewriting rule.