Hello everybody.
I have some doubts on the role of the bbn_consistency flag in CosmoMC. First of all, by default this flag is set to T in batch2/params_CMB_defaults.ini:
As far as I see, this means that we use the Parthenelope fitting table (at $COSMOMC/data) just to calculate the primordial abundances of helium and deuterium as a function of omegabh2 and the extra relativistic number of species (see source/CosmologyParametrizations). These calculations are just theoretical predictions, since the program does not handle observational data on that subject against which these predictions can be compared. Am I right?
Regards