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_8, x_8 is a taxi driver or x_8 is not curious. For all x_8, x_8 is a taxi driver if and only if x_8 will cook. There is at least one x_8 for which x_8 will cook or x_8 is curious.
For all x_8, if x_8 were curious, then x_8 is a taxi driver can be inferred via the universal rewriting rule. For all x_8, if x_8 were a taxi driver, then x_8 is cooking can be inferred via the universal biconditional elimination rule. For all x_8, if x_8 cooks, then x_8 is a taxi driver can be inferred via the universal biconditional elimination rule.