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: For all x_10, if x_10 were poor, then x_10 is a doctor. Michael is a doctor if and only if it is late.
If Michael were a doctor, then it is late can be inferred via the biconditional elimination rule. If it is late, then Michael is a doctor can be inferred via the biconditional elimination rule.