my original name was jac
now I think score_obs is nicer, and follows the pattern loglike_obs
affects currently discrete and base
Is there a PR forthcoming for this? If not, I don't think we should hold up the release for it.
Not sure this really needed to get in for 0.6 but I made a PR. Do we need to deprecate jac?
We skip this for 0.6 unless we handle jac as alias.
REF: Rename jac -> score_obs. Closes #1785.