3 Idioms for Hidden Problems or Disadvantages

The video tutorial discusses the use of idioms in formal communication, particularly in IELTS writing and speaking tasks. It explains the correct usage of 'double-edged sword' and suggests alternative idioms like 'you can't judge a book by its cover' and 'behind closed doors' for argument essays. The tutorial also explores the idiom 'not black and white' to describe complex issues, emphasizing the importance of using idioms correctly to achieve higher scores.

How can the phrase 'the issue is not black and white' be interpreted?

What does the term 'Gray area' refer to in discussions?