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_6, x_6 will read a book. For all x_6, x_6 will climb a mountain and x_6 is a politician.
For all x_6, x_6 will climb a mountain can be inferred via the universal simplification rule. For all x_6, x_6 is a politician can be inferred via the universal simplification rule.