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: Michael is sleeping or Michael is not a poet. For all x_13, if x_13 sleeps, then x_13 is a poet. For all x_13, if x_13 were a poet, then x_13 is sleeping.
If Michael were a poet, then Michael is sleeping can be inferred via the rewriting rule. For all x_13, x_13 will sleep if and only if x_13 is a poet can be inferred via the universal biconditional introduction rule. For all x_13, x_13 is a poet if and only if x_13 will sleep can be inferred via the universal biconditional introduction rule.