I’m using the Advanced II of the Integrated Korean Series right now and I’m coming across many useful fixed expressions that are really helpful in formal, argumentative writing. They are not really considered grammar points, so they can’t be found in grammar books. Nonetheless the ability to use them helps to make you sound more natural and ‘sophisticated’. It’s equivalent to expressions like ‘The hypothesis that ~ does not hold true’, which sounds better than writing things like ‘The idea that ~ is incorrect’ – Even though they roughly mean the same thing.
Although the book does give quite good examples, I find that it is better to find out how it’s used in ‘real life’. I’ll input the phrase into google and see what comes out of it.
Mmm not sure if the font is too small, but you can find many good relevant examples from the search.
예) 굳이 인구 구조를 들먹이지 않더라도 노후대비가 중요하다는 것은 누구나 공감하는 내용일 것이다
굳이 지단이나 앙리의 예를 들먹이지 않더라도
굳이 통계 이야기 들먹이지 않더라도
As you can see, there seem to be many examples that start with 굳이, which was not given in the book. It’s a good way to learn new fixed expressions and improve your Korean proficiency, for those who are already quite familiar with the basics ^^