A Boltzmann brain is a thought experiment that arises in the context of thermodynamics, statistical mechanics, and cosmology. The concept is named after the physicist Ludwig Boltzmann, who made significant contributions to our understanding of entropy and statistical mechanics. In simple terms, a Boltzmann brain is a hypothetical self-aware entity that arises due to random fluctuations in a physical system, such as a universe governed by the laws of thermodynamics.
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