Can a believer fall away?
OBAB—say it out loud. OBAB. Sound stupid? OBAB—Once Believed Always Believed, aka Perserverence of Saints (POS).
OSAS. Sounds cool doesn't it? Almost like an oasis or something, like an exclusive pond of life in the middle of a scorching wilderness. OSAS—Once Saved Always Saved.
So what's the difference? Some may say that OBAB falls under OSAS, and technically it does, but OBAB targets a very specific group who believe that a believer can never fall away, but, instead, will continue to believe in spite of anything.