Copyright laws protect ALL original works from the time they are created. Read about the basics of copyright facts from the U.S. Copyright Office.
I read that and could not find anywhere that copyright applies to what people say.
In the post, I read it to say that quotations could be copyrighted. I did not know that that was possible. The exception would be if someone digitized some words of a quotation or wrote them in a book, then that digitized or book product would be copyrighted.