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_11, if x_11 were a taxi driver, then x_11 is reading a book. For all x_11, x_11 is a taxi driver. For all x_17, x_17 will listen to a song and x_17 will make tea.
For all x_11, x_11 will read a book can be inferred via the universal modus ponens rule. For all x_17, x_17 will listen to a song can be inferred via the universal simplification rule. For all x_17, x_17 will make tea can be inferred via the universal simplification rule.