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_12, x_12 will drink water. For all x_12, if x_12 were a carpenter, then x_12 is not drinking water. William is a carpenter if and only if James is bored.
If William were a carpenter, then James is bored can be inferred via the biconditional elimination rule. If James were bored, then William is a carpenter can be inferred via the biconditional elimination rule. For all x_12, x_12 is not a carpenter can be inferred via the universal modus tollens rule.