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 for which x will not make tea. For all x, x will play squash if and only if x will make tea. For all x, x will play squash if and only if x will drive a car.
For all x, if x plays squash, then x is making tea can be inferred via the universal biconditional elimination rule. For all x, if x plays squash, then x is driving a car can be inferred via the universal biconditional elimination rule. For all x, if x makes tea, then x is playing squash can be inferred via the universal biconditional elimination rule. For all x, if x drives a car, then x is playing squash can be inferred via the universal biconditional elimination rule. There is at least one x for which x will not play squash can be inferred via the existential biconditional elimination rule.