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 bartender or x_10 is an electrician. For all x_10, x_10 is not fast. For all x_10, x_10 is poor if and only if x_10 is a bartender. For all x_10, x_10 is fast or x_10 is not poor.
For all x_10, if x_10 were poor, then x_10 is fast can be inferred via the universal rewriting rule. For all x_10, if x_10 were poor, then x_10 is a bartender can be inferred via the universal biconditional elimination rule. For all x_10, if x_10 were a bartender, then x_10 is poor can be inferred via the universal biconditional elimination rule.