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 is a poet or x_6 will make tea. For all x_6, x_6 is a sailor. For all x_6, if x_6 were a poet, then x_6 is not a sailor.
For all x_6, x_6 is not a poet can be inferred via the universal modus tollens rule.