Scores one sign-in: the notebook's freeman_rba_score().
this sign-in's value per level name
the person's history
everybody's history
{ score, factors }, each factor a feature's population/person ratio, or { score: null, why } for a sign-in that cannot be scored
{ score, factors }
{ score: null, why }
Scores one sign-in: the notebook's freeman_rba_score().