Fragmented interrogative sentences? Yes. Frequently. He explained such fragments are improper English grammar because they contain no object and leave the reader hanging and confused. Furthermore, he warned against ending such a sentence -- heck, any sentence! -- with a preposition, such as "about." He was a real stickler in that regard and the sentence, "Did Your Father Ever Talk To You About?" would have stimulated much conversation on the topic. Furthermore, he explained that such a fragmented sentence with a prepositional ending is a sign the person making the inquiry should not be taken seriously because he is either incapable of forming a basic written sentence or is too lazy to do so. What a great dad!