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: If Jennifer doesn't play squash, then Michael is rich. It is late if and only if Jennifer is playing squash. It is not late.
If it is late, then Jennifer is playing squash can be inferred via the biconditional elimination rule. If Jennifer plays squash, then it is late can be inferred via the biconditional elimination rule. Jennifer is not playing squash can be inferred via the biconditional elimination rule.