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: Jennifer is drinking water. For all x_13, x_13 will make tea if and only if x_13 is a lawyer. Charles is not making tea.
Jennifer is drinking water and Charles is not making tea can be inferred via the conjunction rule. Charles is not making tea and Jennifer is drinking water can be inferred via the conjunction rule. For all x_13, if x_13 makes tea, then x_13 is a lawyer can be inferred via the universal biconditional elimination rule. For all x_13, if x_13 were a lawyer, then x_13 is making tea can be inferred via the universal biconditional elimination rule.