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, x_10 will not make tea or x_10 is a police officer. For all x_10, x_10 will make tea or x_10 will work. For all x_10, x_10 is not a doctor. For all x_10, x_10 will work if and only if x_10 is a doctor.
For all x_10, x_10 will work or x_10 is a police officer can be inferred via the universal resolution rule. For all x_10, if x_10 works, then x_10 is a doctor can be inferred via the universal biconditional elimination rule. For all x_10, if x_10 were a doctor, then x_10 is working can be inferred via the universal biconditional elimination rule. For all x_10, x_10 will not work can be inferred via the universal biconditional elimination rule.