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 will make tea if and only if x is an electrician. For all x, if x drinks water, then x is an electrician. For all x, if x makes tea, then x is drinking water.
For all x, if x makes tea, then x is an electrician can be inferred via the universal transitivity rule. For all x, if x makes tea, then x is an electrician can be inferred via the universal biconditional elimination rule. For all x, if x were an electrician, then x is making tea can be inferred via the universal biconditional elimination rule.