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, x is rich if and only if x is curious. Elisabeth is curious if and only if Elisabeth is rich.
If Elisabeth were curious, then Elisabeth is rich can be inferred via the biconditional elimination rule. If Elisabeth were rich, then Elisabeth is curious can be inferred via the biconditional elimination rule. For all x, if x were rich, then x is curious can be inferred via the universal biconditional elimination rule. For all x, if x were curious, then x is rich can be inferred via the universal biconditional elimination rule.