The medicine forum is not filled with psychics, thus it can't guarantee whether you get in or not.
What it does do is provide snippets of med school related facts, wisdom, trivia and general nonsense that can help you make your own mind up. After that it's really up to you. Think of the medicine forum as the "big kids" at school sharing their experiences with you. They're educated and informed anecdotes, sure, but they are anecdotes nonetheless, nothing on this forum is gospel.
Though that said, the quality of advice given by the students, doctors and even sometimes the pre-freshers in 195 is top notch compared to many other similar forums.