Consider the following premises. For all x, if x were curious, then x is running. For all x, x will not go running. For all x, if x goes running, then x is curious. For all x, if x goes running, then x is curious. For all x, x is curious if and only if x will read a book. Can we infer the following from them? There is at least one x for which x will read a book.
 From the fact that for all x, if x were curious, then x is running, and that for all x, if x goes running, then x is curious we can infer that for all x, x is curious if and only if x will go running. From the fact that for all x, x is curious if and only if x will go running we can infer that for all x, if x were curious, then x is running. From the fact that for all x, if x were curious, then x is running, and that for all x, if x goes running, then x is curious we can infer that for all x, x is curious if and only if x will go running. From the fact that for all x, x is curious if and only if x will go running, and that for all x, x will not go running we can infer that for all x, x is not curious. Finally, from the fact that for all x, x is curious if and only if x will read a book, and that for all x, x is not curious we can infer that for all x, x will not read a book, which contradicts that There is at least one x for which x will read a book. Therefore, the answer is no.