I think that ~たり~たりする generally means "do things like (among other things)", but in dictionary definitions, can the pattern ~たり~たりする mean "and", "or" or "and/or"?
In e.g. XたりYたりする would it imply that both X and Y occur or can X occur without Y occurring (or vice versa)?
In the Daijisen definition for よく for example, it's used in the following way:
困難なことをしたり、考えられないような喜ばしい結果を得たりして感じ入るさま。
Being impressed by something which takes difficulty (or? and? and/or?) the achievement of an unthinkably delightful outcome.
How would it differ from dictionary form verb+ことや (if "or") and ~て/~で (if "and") etc.?