The whole of this chapter is based on classical statistical inference, which assumes that the population parameters are fixed constants with no uncertainty. Bayesian statisticians relax this assumption and treat both variables and population parameters as random variables. The extra uncertainty in the population parameters can sometimes lead to different Bayesian inferences to those found using classical inference. A clear non-mathematical introduction to Bayesian statistics can be found in Berry (1996).
Many wise and amusing words on the difficult art of inference
and its potential pitfalls can be found in the
stories of Sherlock Holmes by Sir Arthur Conan Doyle.