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: There is at least one x_11 for which x_11 will play squash or x_11 is curious. For all x_11, if x_11 plays squash, then x_11 is a bartender. For all x_11, x_11 is rich. For all x_11, x_11 is a bartender or x_11 is not curious.
For all x_11, if x_11 were curious, then x_11 is a bartender can be inferred via the universal rewriting rule.