An amazing examination of a curious and mostly harmless genetic mutation.
I'm really not sure. It seems to me that the random creation of a structure capable of cognition from a collection of particles in equilibrium would involve a smaller decrease in the local entropy than a Big Bang would, but we also understand so little about how a Big Bang is generated.
I still think the idea that you could be a Boltzmann brain is still implausible for a variety of reasons though. The timescale for generating an entity capable not only of cognition, but of a consistent memory of experience and history of a whole universe... is beyond ridiculous, and it assumes a reality with sufficient space and time for this to occur (which we cannot test, therefore this is more philosophy than science). It seems more plausible that the universe we think we live in is as we think it is, and it naturally leads to the development of meat brains.