The mediocre chess player is someone who can't flesh out all the details let's say of the game plan of the decision tree. If you were a computer playing chess then for any move that you made your player made you'd be able to in a sense see all the possible moves both for yourself and for your opponent it's really if we had that kind of capacity then it would like life would just be like playing a chess game.
Philosopher and author L.A. Paul talks about her book Transformative Experience with EconTalk host Russ Roberts. Paul explores the uncertainties that surround the transformative experiences that we choose and that happen to us without choosing. How should we think about the morality and personal impact of these kinds of experiences, especially when some decisions are very hard or impossible to reverse? Examples include becoming a vampire, having children, religion, and other life experiences and choices.