Boltzmann Brain
I&#x27;ve always enjoyed this thought experiment and the loosely related one - Last Thursdayism[0].<p>[0] <a href="https:&#x2F;&#x2F;rationalwiki.org&#x2F;wiki&#x2F;Last_Thursdayism" rel="nofollow">https:&#x2F;&#x2F;rationalwiki.org&#x2F;wiki&#x2F;Last_Thursdayism</a>