@Horace phil,
Well, when I used to be a math tutor, many of my students would come to me doing homework wrong, and then would basically expect me to go through with them how to get the right answers. Sure they did the work, but it was wrong, and they knew it. I am not saying that you are doing this, but based on experience that is what I have witnessed.
I honestly have no clue when it comes to logic. So I could not tell you whether what you did was right or wrong.