By the kinds of questions they ask.
Some people get what it takes even though they don't yet know what it takes. What that means is they understand that they have a lot to learn, they have a desire to learn, and they ask thoughtful questions that lead to the kind of answers that further their knowledge and take them closer to their goal of a successful online business.
Then there's the other kind of newbie. They ask questions that don't further their understanding of Internet Marketing. They ask what I'd call "cocktail party" questions. They are conversation starters and nothing more. They do not lead to the kind of answers that take them closer to their goals, if they have goals.
If you want to succeed - in anything - you have to ask good questions. I've seen quite a few "cocktail party" questions lately. Questions that really don't belong in this forum, they belong in the off topic forum. But this isn't a rant about that, it's just a wee bit of advice from someone whose been around the block quite a few times...
If you want more success, ask better questions.
If you ask silly questions you get back friendly banter that doesn't help you earn money. If you ask better questions you get back answers that help further your knowledge base and move you one step closer to your goal.
Your choice. Which do you want, success...or an online cocktail party?