Some people, like my friend, don’t even consciously realise they’re doing this kind of “challenge the integrity of the rules in my favour” thing. Sometimes this takes the form of other players graciously saying they won’t ask for an “undo” and these kinds of people not reading the room and asking for it themselves. You can’t just say no, else it risks an argument. Other than such caveats, yes, assuming people are trying to win is a fun way to play things.

Another thing is, like, he miscounts points and such at the same rate as anyone else would, but somehow the miscount is in his favour 80% of the time. I don’t really get how this happens on a psychological level, especially with an otherwise really nice person.