My question concerns the IELTS task 2 essays. I wonder if one should state their opinion in the conclusion paragraph or they should state it in both introduction and conclusion paragraph. Is there any difference at all?
If the marker doesn't know what you believe before they get to the conclusion, you haven't written a good essay.
Remember, the conclusion is a summing up - you don't introduce new material here.
What I mean by repeating your opinion "qualified by your discussion" is this: In the introduction, you can say that you will be arguing the case for B. You do that in the body; and then in the conclusion, you can say something like: "From the arguments given above, even though there are some grounds for considering A, I believe that I've shown B to be the most useful course of action".
That's just one approach, but don't keep the marker guessing.
I'd be grateful if you could answer this question too. Is this statement of the opinion put in the thesis statement? In most cases using the thesis statement we tell the readers what, or what aspects of the topic, will be discussed in our paragraphs, while no opinion is given.