If I receive a positive bona fide determination, does that mean my T visa application will be approved?
If you receive a positive bona fide determination, it is a good sign for your application, but it is not the same thing as having your T visa approved.
If you receive a negative bona fide determination, it is sometimes still possible for your full T visa application to be approved – USCIS will take a second, closer look at what you filed and might request more evidence. You will eventually receive a final decision either approving or denying your T visa.1
1 8 CFR 214.205(a)(3)