Consider the following premises. For all y, y is not an artist. There is at least one y for which y will read a book if and only if y is an artist. For all y, if y reads a book, then y is an artist. Can we infer the following from them? If we can, name the inference rule being used: For all y, y will read a book.
 From the fact that there is at least one y for which y will read a book if and only if y is an artist we can infer that there is at least one y for which if y were an artist, then y is reading a book via existential biconditional elimination. From the fact that for all y, if y reads a book, then y is an artist, and that there is at least one y for which if y were an artist, then y is reading a book we can infer that there is at least one y for which y will read a book if and only if y is an artist via existential biconditional introduction. Finally, from the fact that there is at least one y for which y will read a book if and only if y is an artist, and that for all y, y is not an artist we can infer that there is at least one y for which y will not read a book via existential biconditional elimination, which contradicts that For all y, y will read a book. Therefore, the answer is no.