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 were a taxi driver, then Sarah is listening to a song. For all x_12, x_12 is curious if and only if x_12 is a taxi driver. For all x_10, x_10 will not listen to a song.
For all x_12, if x_12 were curious, then x_12 is a taxi driver can be inferred via the universal biconditional elimination rule. For all x_12, if x_12 were a taxi driver, then x_12 is curious can be inferred via the universal biconditional elimination rule.