  The intrinsic quark-antiquark pairs generated by the minimal energy
nonperturbative meson-baryon fluctuations in the nucleon sea provide a
consistent framework for understanding a number of empirical anomalies observed
in the deep inelastic quark-parton structure of nucleons: the flavor asymmetry
of the nucleon sea implied by the violation of Gottfried sum rule, the proton
spin problem implied by the violation of the Ellis-Jaffe sum rule, and the
outstanding conflict between two different determinations of the strange quark
sea in the nucleon.
