Please reopen this question
that I estimate useful for all people working in a Beyasian/Fisher information/Markov-chain in a Physical context, especiallly in Astrophysical and Cosmological context.
This may help to better understand the different steps from the etablishment of a model and how to find the fiducial values of parameters up to the final estimation of parameters (posterior) to see the validity of the theoritical model.
As I said in comment, I think this would be a disgrace to not take into account all the methodology to apply.
If you could re-open it, I would be grateful.