[kd0amg]

The language of someone who's rational would respond to the issues raised by the interlocutor instead of just insulting him.

[dragonwriter]

> The language of someone who's rational would respond to the issues raised by the interlocutor

Not necessarily. You are confusing social graces with rationality; rationality is optimized pursuit of one's own utility, not politeness.

[mdp2021]

Which happened in other contexts. There, he did not need to do differently and was just being concise.