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: Barbara is happy or it is windy. For all x_13, x_13 will not drink water. For all x_13, x_13 is happy if and only if x_13 is excited. For all x_13, x_13 is excited if and only if x_13 will drink water.
For all x_13, if x_13 were happy, then x_13 is excited can be inferred via the universal biconditional elimination rule. For all x_13, if x_13 were excited, then x_13 is drinking water can be inferred via the universal biconditional elimination rule. For all x_13, if x_13 were excited, then x_13 is happy can be inferred via the universal biconditional elimination rule. For all x_13, if x_13 drinks water, then x_13 is excited can be inferred via the universal biconditional elimination rule. For all x_13, x_13 is not excited can be inferred via the universal biconditional elimination rule.