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 is a doctor. For all x_10, x_10 is a taxi driver. For all x_10, x_10 is a nurse.
For all x_10, x_10 is a doctor and x_10 is a taxi driver can be inferred via the universal conjunction rule. For all x_10, x_10 is a doctor and x_10 is a nurse can be inferred via the universal conjunction rule. For all x_10, x_10 is a taxi driver and x_10 is a doctor can be inferred via the universal conjunction rule. For all x_10, x_10 is a taxi driver and x_10 is a nurse can be inferred via the universal conjunction rule. For all x_10, x_10 is a nurse and x_10 is a doctor can be inferred via the universal conjunction rule. For all x_10, x_10 is a nurse and x_10 is a taxi driver can be inferred via the universal conjunction rule.