Classically, the second law of thermodynamics implies that our knowledge about a system always decreases. A more flattering interpretation connects entropy with the uncertainty inherent to quantum mechanics.
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Lloyd, S. Excuse our ignorance. Nature Phys 2, 727–728 (2006). https://doi.org/10.1038/nphys456
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DOI: https://doi.org/10.1038/nphys456
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