Consider the following premises. For all y, if y were a taxi driver, then y is curious. There is at least one y for which if y makes tea, then y is a taxi driver. For all y, y is curious if and only if y will make tea. Can we infer the following from them? If we can, name the inference rule being used: For all y, if is not true that y is curious if and only if y is a taxi driver.
That contradicts the premises. Therefore the answer is no.