Question on Introduction of LNAT Section B essay

Many lecturers etc.. have advised that the introduction should contain a concise answer to the argument/question provided- should be direct whether I agree or disagree. However, in an LNAT textbook, it advised me of a tentative or affirmative answer for example as an answer to whether the UK should codify its constitution it states a good introduction on an exemplar essay was "This essay considers whether a codified constitution would be beneficial".
In my opinion, this introduction is not direct and does not state the writer's opinion.
Can somebody explain to me whether the tentative introduction provided was good or if a direct intro would be more suitable??