Notice that "<|endoftext|>" delimiter. A lot of the samples I generated had that, and would then rapidly switch into a whole different tone or style. Maybe there was an error in their training where they somehow didn't separate training samples properly? I don't know enough about machine learning to say.
I also find it interesting that this sample got -4 points where the Sokal affair sample I posted got +4 points.
I imagine it has more to do with the emotions each sample evokes in various hackernews readers. Could it be that hackernews readers are likely to have a distaste for postcolonialism, but are likely to be fans of materialist rationalism? I think so, based on years of reading their comments :)