  Analyses of the three valence-quark bound-state problem in relativistic
quantum field theory predict that the nucleon may be understood primarily as a
Borromean bound-state, in which binding arises mainly from two separate
effects. One originates in non-Abelian facets of QCD that are expressed in the
strong running coupling and generate confined but strongly-correlated
colour-antitriplet diquark clusters in both the scalar-isoscalar and
pseudovector-isotriplet channels. That attraction is magnified by quark
exchange associated with diquark breakup and reformation. Diquark clustering is
driven by the same mechanism which dynamically breaks chiral symmetry in the
Standard Model. It has numerous observable consequences, the complete
elucidation of which requires a framework that also simultaneously expresses
the running of the coupling and masses in the strong interaction. Planned
experiments are capable of validating this picture.
