Current unknowns in the three neutrino framework
  We present an up-to-date global analysis of data coming from neutrino
oscillation and non-oscillation experiments, as available in April 2018, within
the standard framework including three massive and mixed neutrinos. We discuss
in detail the status of the three-neutrino (3nu) mass-mixing parameters, both
known and unknown. Concerning the latter, we find that: normal ordering (NO) is
favored over inverted ordering (IO) at 3sigma level; the Dirac CP phase is
constrained within ~15% (~9%) uncertainty in NO (IO) around nearly-maximal
CP-violating values; the octant of the largest mixing angle and the absolute
neutrino masses remain undetermined. We briefly comment on other unknowns
related to theoretical and experimental uncertainties (within 3nu) or possible
new states and interactions (beyond 3nu).
