# Blur and perceptual content **Opening (not a real abstract):** Uffink, J. 2001. Bluff your way in the second law of thermodynamics. Studies in History and Philosophy of Science Part B: Studies in History and Philosophy of Modern Physics 32: 305–94. Uffink, J. 2007. Compendium of the foundations of classical statistical physics. In Philosophy of Physics, eds. J. Butterfield and J. Earman. Amsterdam: North Holland. Uhlenbeck, G.E. and G.W. Ford. 1963. Lectures in Statistical Mechanics. Providence, RI: American Mathematical Society. van Lith, J. 1999. Reconsidering the concept of equilibrium in classical statistical mechanics. Philosophy of Science 66: 107–18. **Authors:** [[BENCE NANAY]]