Proles being able to rebel
Yes, technically the proles could rebel against Big Brother. They make up nearly 85% of the population of Oceania which means they definitely have the majority and could muster the strength to defeat Big Brother. They also don't have telescreens watching over them like the other citizens which could make for an easier rebellion. However, the proles lead brutish, ignorant, animalistic lives, and lack both the energy and interest to even revolt. Along with that most of the proles do not even understand that the Party (Big Brother) is oppressing them. This leads to the proles most likely not being able to rebel against Big Brother.