"e. , the original is constituted by the model and that makes devations from model to original imposible . On ontology is in constituting reference mode to the domain it constitutes. The distinction between descriptive and prescriptive reference mode goes at least back to Wieringa, [2]. More detail and references regarding models and modeling can be found, e. g. , in [3]. Coast Guard Ship Model II. The consistency of models may be conceptual or physical. "

" There are twelve different types, or "flavours", of fermions in the Standard Model. Amongst the proton, neutron, and electron, those fermions which constitute the vast majority of matter, the Standard Model considers only the electron a fundamental particle. The proton and neutron are aggregates of smaller particles known as quarks, which are held together by the strong interaction. The fundamental fermions in the Standard Model are given in the table. Table Left handed fermions in the Standard Model Fermion (Left-handed) Symbol Electric charge Weak charge* Weak isospin Hypercharge Color charge* Mass** Generation 1 Electron e -1 2 -1/2 -1/2 1 0. 511 MeV Electron neutrino νe 0 2 +1/2 -1/2 1 < 50 eV Positron ec 1 1 0 1 1 0. 511 MeV Electron antineutrino 0 1 0 0 1 < 50 eV Up quark u +2/3 2 +1/2 +1/6 3 ~5 MeV *** Down quark d -1/3 2 -1/2 +1/6 3 ~10 MeV *** Anti-up antiquark uc -2/3 1 0 -2/3 ~5 MeV *** Anti-down antiquark dc +1/3 1 0 +1/3 ~10 MeV *** Generation 2 Muon μ -1 2 -1/2 -1/2 1 105. Model Ship Display6 MeV Muon neutrino νμ 0 2 +1/2 -1/2 1 < 0. 5 MeV Anti-Muon μc 1 1 0 1 1 105. "