No quark has ever been observed in isolation. The Standard Model treats this as an interesting property of QCD (confinement) while maintaining that quarks are real particles. Pentagon Physics offers a different interpretation: quarks are eigenvalues of the 600-cell adjacency operator, not particles. The numbers reported by the Particle Data Group as 'quark masses' are coupling strengths extracted by perturbation theory from non-perturbative standing waves — they are artefacts of the extraction method, not masses of objects. The proton is six eigenvalues in three-phase balance. Its mass is derived to 0.006% with zero free parameters.