Hey guys, I'm reading a book on grammar and it says that colons/semicolons can be used in the place of a comma to put extra emphasis on separating ideas. I have a problem with that cause in college I was taught that you should only use a semicolon/colon when you want to inidcate that there is alot of information following in part of a sentence. Here is an example: "In mathematics there are several basic things you need to learn such as: addition, subtraction, multiplication and division" This is an example given by the book that I disagree with.... "Profiles are text commands that contain certain commands. You can edit them, but always keep a backup: If you change them incorrectly, the behavior of the editor may be affected." Wouldn't you just use a period after "backup"?. The book says there is a connection between the last two ideas and I think I see it, so are colons/semicolons more or less important than commas and should I watch out for them in my writing? or is it just a matter of style?. Sorry for the long post, any feedback is greatly appreciated!