A general argument against the universal validity of the superposition principle

J. von Neumann, Mathematisce Grundlagen der Quantummechanik, Springer, Berlin, 1932; English translsation: Mathematical Foundations of Quantum Mechanics, Princeton University Press, 1955. Ghirardi, 1986, Phys. Rev. D, 34, 470, 10.1103/PhysRevD.34.470 Ghirardi, 1990, Phys. Rev. A, 42, 78, 10.1103/PhysRevA.42.78 Ghirardi, 1990, Found. Phys., 20, 1271, 10.1007/BF01883487 Ghirardi, 1995, Found. Phys., 25, 5, 10.1007/BF02054655 Bohm, 1952, Phys. Rev., 85, 166, 10.1103/PhysRev.85.166 D. Dürr, S. Goldstein, N. Zanghı́, in: Bohmian mechanics and quantum theory: an appraisal, Boston Studies in the Philosophy of Science 184 vol. 21, Kluwer Academic Publishers, Dordrecht, 1996. Daumer, 1997, Erkenntnis, 45, 379, 10.1007/BF00276801 E.P. Wigner, in: The scientist speculates, W. Heinemann, London, 1961. Everett, 1857, Rev. Mod. Phys., 29, 454, 10.1103/RevModPhys.29.454 Wheeler, 1957, Rev. Mod. Phys., 29, 463, 10.1103/RevModPhys.29.463 Griffiths, 1984, J. Stat. Phys., 36, 219, 10.1007/BF01015734 Omnès, 1988, J. Stat. Phys., 53, 893, 10.1007/BF01014230 Omnès, 1988, J. Stat. Phys., 53, 933, 10.1007/BF01014231 Omnès, 1988, J. Stat. Phys., 53, 956 M. Gell-Mann, J.B. Hartle, in: S. Kobayashi et al. (Eds.), Proc. 3rd international symposium on the Foundations of quantum mechanics in the light of new technology, Physical society of Japan, Tokio, 1990. H. Primas, in: K.V. Laurikainen, J. Viiri (Eds.), Symposium on the Foundations of Mod. Phys. 1990, Joensuu, Finland. Discussion Sections. W. Zurek, Physics Today, October (1991) pp. 36-44. D. Giulini, E. Joos, C. Kiefer, J. Kumpsch, I.-O. Stamatescu, H.D. Zeh, Decoherence and the Appearance of a Classical World in Quantum Theory, Springer, Berlin, 1996. B. d'Espagnat, Conceptual foundations of quantum mechanics, 2nd ed., Addison Wesley Publishing Company, Reading, MA (1989).