  The evolution of single-particle strengths as the neutron-to-proton asymmetry
changes informs us of the importance of short- and long-range correlations in
nuclei and has therefore been extensively studied for the last two decades.
Surprisingly, the strong asymmetry dependence of these strengths and their
extreme values for highly-asymmetric nuclei inferred from knockout reaction
measurements on a target nucleus are not consistent with what is extracted from
electron-induced, transfer, and quasi-free reaction data, constituting a
two-decade old puzzle. This work presents the first consistent analysis of
one-nucleon transfer and one-nucleon knockout data, in which theoretical
uncertainties associated with the nucleon-nucleus effective interactions
considered in the reaction models are quantified using a Bayesian analysis. Our
results demonstrate that, taking into account these uncertainties, the
spectroscopic strengths of loosely-bound nucleons extracted from both probes
agree with each other and, although there are still discrepancies for
deeply-bound nucleons, the slope of the asymmetry dependence of the
single-particle strengths inferred from transfer and knockout reactions are
consistent within $1\sigma$. Both probes are consistent with a small asymmetry
dependence of these strengths. The uncertainties obtained in this work
represent a lower bound and are already significantly larger than the original
estimates.
