Consider the following premises. Susan is not driving a car. For all y, y will write a letter if and only if y is an electrician. James is not an electrician. For all x, x will make tea if and only if x will drive a car. Can we infer the following from them? James is writing a letter.
 From the fact that for all y, y will write a letter if and only if y is an electrician we can infer that James is writing a letter if and only if James is an electrician. Finally, from the fact that James is writing a letter if and only if James is an electrician, and that James is not an electrician we can infer that James is not writing a letter, which contradicts that James is writing a letter. Therefore, the answer is no.