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_20, x_20 will drink water and x_20 is an artist. If Jennifer plays squash, then Barbara is not drinking water.
For all x_20, x_20 will drink water can be inferred via the universal simplification rule. For all x_20, x_20 is an artist can be inferred via the universal simplification rule.