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_9, x_9 will play a game. It is not windy. Linda is playing tennis if and only if it is windy.
If Linda plays tennis, then it is windy can be inferred via the biconditional elimination rule. If it is windy, then Linda is playing tennis can be inferred via the biconditional elimination rule. Linda is not playing tennis can be inferred via the biconditional elimination rule.