Boltzmann brain has a solipsistic element. It's not just that "you" are a Boltzmann brain, it's that the entire universe you're experiencing is just a figment o

Boltzmann brain has a solipsistic element. It's not just that "you" are a Boltzmann brain, it's that the entire universe you're experiencing is just a figment of your imagination. Furthermore, you don't know how long this experience has been going on since all your memories might be entirely fake (ie maybe you came into existence a mere moment ago and will cease to exist in the next instance; you only have fakeable memories of the past, an unreliable perception of the present, and no knowledge of the future).