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: Mary is not sad or Michael is a sailor. Mary is sad or it is late. For all x_10, x_10 will work or x_10 is not a sailor. If it is late, then Michael is working.
It is late or Michael is a sailor can be inferred via the resolution rule. If Michael drives a car, then Mary is not sad can be inferred via the rewriting rule. For all x_10, if x_10 were a sailor, then x_10 is working can be inferred via the universal rewriting rule.