I am not. I try to understand. I basically asked in post #5 about details, you did not answer, I asked you privately per PM without an answer, so I tried a provocative statement:
This is clearly a personal opinion. It is my impression. Correct me if I'm wrong. It was by no means offensive. I didn't even say that you weren't willing to learn. I said I don't see a certain subject you are interested in. This was meant as a hidden question about which subject. Again, a provocation? Yes, but not an insult.No, he did not. He made an assumption, namely that you would have meant all possible matrices over a ring, and then answered to that assumption. Without such guesses, he wouldn't have been able to give a qualified answer which he did, under his assumption. Without such a condition, we would be in the situation of post #5. You might have felt that he gave you an answer, but I doubt - again my personal opinion - that you understood what he wrote.
I still try to figure out how we could help you best - and, this is the strict requirement in all of our technical forums, without just talking on a fb level. Your questions are basically all substandard and I could - and probably would better - hide behind our rules and close the threads instead; anonymous and forcing you into a private dialogue. Instead, I tried to provoke you, after asking for explanations in vain. I apologize if that insulted you. It wasn't meant that way. It was an attempt to bring you to the table. You asked a lot about vectors and related topics. Now, we can neither replace a college course nor what is written already on Wikipedia, so we need to know how we can help. And, sorry to say this, but this begins with your substandard questions. All which I have seen required additional guesses before they could be answered. So we either have to give up our standards, or you be more specific in what and why you ask.