This is a follow-up to my previous question. The answerer mentioned that when parentheses are used for inserting contents in a sentence, the grammar flexibility is assumed to be higher. If that is ...
In formal writing, should I use an em dash The Earth consists of three layers — crust, mantle, and core. or a colon The Earth consists of three layers: crust, mantle, and core. ?
I need to write something like Students were silenced because of social media posts: a case of non-freedom. That isn't the exact context, but I need to know if non-freedom is correct.