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_14, x_14 is rich. There is at least one x_14 for which x_14 will play squash if and only if x_14 is rich.
There is at least one x_14 for which if x_14 plays squash, then x_14 is rich can be inferred via the existential biconditional elimination rule. There is at least one x_14 for which if x_14 were rich, then x_14 is playing squash can be inferred via the existential biconditional elimination rule.