Consider the following premises. There is at least one y for which if y works, then y is a mechanic. For all y, y is a mechanic if and only if y will work. For all y, y is a mechanic if and only if y is bored. Can we infer the following from them? If we can, name the inference rule being used: For all y, the fact that y works does not imply that y is bored.
That contradicts the premises. Therefore the answer is no.