How do you differentiate between A stated main idea in a implied mean idea how to detail supports the main idea

A stated main ideaA main idea that has been explicitly written in an article, essay, or other reading., as opposed to an implied main ideaA main idea—the most important idea or central thought in a paragraph or reading—that is not stated directly, as opposed to an explicit main idea., is one the author writes ...
(I googled this:) )