This discussion is not a complete waste of time now that I've learned another nugget of obscure obsolete English.
Please, let's not discuss anything sarcastically. I clearly said it is used nowadays for only humorous usage. And from Wiktionary, I quoted "
(obsolete except in past tense quoth) To say or
You can take more care over the standard of your English.
Although It happened that you did correct an unintentionally mistake that other members made, I don't object and I also assure you that I am not a machine. I do make mistakes. To err is human. We, no doubt, make mistakes without exception. I do not comment on anyone's mistakes in a separate post!
What do you mean by 'problematic sentences'? Why would you want to discuss a sentence that is problematic?
"Problematic" means difficult or needing more clarification. The best people to get language consult/advice from are natives.
Not all sentences need question tags!
I do know this. Usually/Generally/Normally, not all sentences need to be tagged. But on special occasions or for special/specific context, there might be some exceptions. Also, I just ask you about the question tag theoretically, then you, generously, can tell me whether it is natural or not in ordinary usage.
I admire your passion for analysing language but I think that if you stick to real, natural language, you will get the most fruitful answers.
I have limited questions that I will have to ask, then I will be done with confusion, I hope.
Please, be patient with me and just tell me the answer theoretically, then you, generously, can tell me whether it is natural or not in ordinary usage.
Opinions on what? There is no room for 'opinion' here. We can tell you facts about use of English.
If we do disagree, there can be room for doubt since there are no language facts that people can disagree over. Facts are taken for granted. Since we sometimes disagree and see some things from one's own different perspective, it might be better to call it 'attitudes/viewpoints' and it is not a bad concept at all as every single word you write is appreciated.
So ask us a clear question and we'll attempt to give a clear answer.
Is my question not clear?