> No matter whether you prefer the frequentist's view or the Bayesian's view...
I don't think the intended audience reading this chapter has this preference at all...
Then the set notation uses square brackets instead of curly braces? I cannot get over this for some reason.
Also you are right, set notation does use curly braces, I am relieved :-). I was confused by the A = [-1, 1-1/n] (interval set notation) on page 8 that I misread as [-1, 1, 1/n]...
I don't think the author is asking you to, at all. They are pointing out that there are two "camps" and you will see these terms bandied about (e.g. if you google stuff). But then they claim (rightly, I think for an intro like this) that it doesn't really matter for the material to (immediately) follow and you are better off focusing on more fundamental ideas of probability.