[red75prime]

Another Boltzmann brain can pop up, which contains a short term memory of being previous Boltzmann brain. Sensory inputs aren't constrained though. Most probable sequence of such brains should feel like noise all over your senses, I think.

[marcosdumay]

Another Boltzmann brain can pop up with the result of whatever decision the previous brain could have made, the actual decision it made is irrelevant.