As I have said before, the BB is a scattered being in your model, but you yourself might be a scattered being in the BB’s model. So there are not two worlds, a real one and a BB one. There are just two real ones. A better way to think about it might be like special relativity, where each observer has a resting frame and might be moving relative to other ones. In the same way each observer has a reference frame where they are real.
If everything that’s possible exists, so do Boltzmann brains. We need some way to quantify existence, such as by likelyhood.
Don’t see any problem with BB existence. For each BB exists a real world there the same observer-moment is justified.
As I have said before, the BB is a scattered being in your model, but you yourself might be a scattered being in the BB’s model. So there are not two worlds, a real one and a BB one. There are just two real ones. A better way to think about it might be like special relativity, where each observer has a resting frame and might be moving relative to other ones. In the same way each observer has a reference frame where they are real.