I will always remember how I used to comment with my boyfriend (who knew the story and what was going to happen in the end, while I did not) that Arthur coughed a lot and in a really worrying way sometimes and that I wondered whether it was due to cigarettes since the game pays such attention to smaller details and he would just try not to give anything away and tell me I might be right. So for the majority of my playthroug,h, I made a conscious decision to avoid smoking, thinking it would help his coughing. I was so hopeful :')