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: Mary is drinking water. If Jessica were a soldier, then Mary is not drinking water. If Elisabeth plays tennis, then Jessica is a soldier.
Jessica is not a soldier can be inferred via the modus tollens rule. If Elisabeth plays tennis, then Mary is not drinking water can be inferred via the transitivity rule.