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, x is a mechanic. For all x, x is a sailor.
For all x, x is a mechanic and x is a sailor can be inferred via the universal conjunction rule. For all x, x is a sailor and x is a mechanic can be inferred via the universal conjunction rule.