I can't be bothered to put this in context, but when a person is tired or out of it and happens to make casual comments at a convo that don't show enough effort put in, in a situation where it isn't made clear what's serious conversation and what's not cause every other thing a person says might be personally relevant or might be total bs, sometimes this is because they don't know what to bother to put effort into cause they don't know if they're answering a serious question.
If the person's brain isn't the bit that's not working, but they're still struggling with something that's simple in a thinking sense, giving a simple answer might not be an attempt to insult them, it might just be that when a person's head isn't clear and they are worried/anxious, trying to give something very basic to focus on that makes simple sense and try not to let thought distortion take hold... unless thought distortion takes hold of the comment and turns it into an insult instead of understanding that the person has been given no (clear/direct) signal they really need to take it seriously and try to help.
Unfortunately by the time thought distortion has taken hold, its no longer "oi, pay attention, i need your help with this, i feel like you're not taking me seriously" and has become some horrible insult to the person at the deepest level possible, while the other person is still busy going uh? (if they just got in from a long day or are slightly stoned at the time or something ! lol)
The DSM let me off on a technicality.