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_17, if x_17 were a poet, then x_17 is making tea. For all x_17, x_17 will drink water or x_17 is a poet. For all x_17, x_17 will not drink water or x_17 is a police officer. For all x_17, x_17 will make tea or x_17 is not a police officer. Michael is a mechanic.
There is at least one x for which x is a mechanic can be inferred via the existential generalization rule. For all x_17, x_17 is a poet or x_17 is a police officer can be inferred via the universal resolution rule. For all x_17, if x_17 were a police officer, then x_17 is making tea can be inferred via the universal rewriting rule.